diff --git a/wp-includes/css/jquery-ui-dialog-rtl.css b/wp-includes/css/jquery-ui-dialog-rtl.css
index 30c4a37308..779ee15122 100644
--- a/wp-includes/css/jquery-ui-dialog-rtl.css
+++ b/wp-includes/css/jquery-ui-dialog-rtl.css
@@ -182,7 +182,7 @@
 	display: inline-block;
 	text-decoration: none;
 	font-size: 13px;
-	line-height: 26px;
+	line-height: 2;
 	height: 28px;
 	margin: 0;
 	padding: 0 10px 1px;
@@ -272,7 +272,7 @@
 	height: 36px;
 	font-size: 18px;
 	font-weight: 600;
-	line-height: 36px;
+	line-height: 2;
 	padding: 0 16px 0 36px;
 }
 
@@ -298,7 +298,7 @@
 	speak: none;
 	-webkit-font-smoothing: antialiased;
 	-moz-osx-font-smoothing: grayscale;
-	line-height: 36px;
+	line-height: 1.8;
 	width: 36px;
 	height: 36px;
 	content: "\f158";
diff --git a/wp-includes/css/jquery-ui-dialog-rtl.min.css b/wp-includes/css/jquery-ui-dialog-rtl.min.css
index cf67da9878..7880f94608 100644
--- a/wp-includes/css/jquery-ui-dialog-rtl.min.css
+++ b/wp-includes/css/jquery-ui-dialog-rtl.min.css
@@ -15,4 +15,4 @@
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license.
  * http://jquery.org/license
- */.ui-resizable{position:relative}.ui-resizable-handle{position:absolute;font-size:.1px;display:block;touch-action:none}.ui-resizable-autohide .ui-resizable-handle,.ui-resizable-disabled .ui-resizable-handle{display:none}.ui-resizable-n{cursor:n-resize;height:7px;width:100%;top:-5px;right:0}.ui-resizable-s{cursor:s-resize;height:7px;width:100%;bottom:-5px;right:0}.ui-resizable-e{cursor:e-resize;width:7px;right:-5px;top:0;height:100%}.ui-resizable-w{cursor:w-resize;width:7px;left:-5px;top:0;height:100%}.ui-resizable-se{cursor:se-resize;width:12px;height:12px;right:1px;bottom:1px}.ui-resizable-sw{cursor:sw-resize;width:9px;height:9px;left:-5px;bottom:-5px}.ui-resizable-nw{cursor:nw-resize;width:9px;height:9px;left:-5px;top:-5px}.ui-resizable-ne{cursor:ne-resize;width:9px;height:9px;right:-5px;top:-5px}.ui-button{display:inline-block;text-decoration:none;font-size:13px;line-height:26px;height:28px;margin:0;padding:0 10px 1px;cursor:pointer;border-width:1px;border-style:solid;-webkit-appearance:none;border-radius:3px;white-space:nowrap;box-sizing:border-box;color:#555;border-color:#ccc;background:#f7f7f7;box-shadow:0 1px 0 #ccc;vertical-align:top}.ui-button:active,.ui-button:focus{outline:0}.ui-button::-moz-focus-inner{border-width:0;border-style:none;padding:0}.ui-button:focus,.ui-button:hover{background:#fafafa;border-color:#999;color:#23282d}.ui-button:focus{border-color:#5b9dd9;box-shadow:0 0 3px rgba(0,115,170,.8)}.ui-button:active{background:#eee;border-color:#999;box-shadow:inset 0 2px 5px -3px rgba(0,0,0,.5);transform:translateY(1px)}.ui-button:disabled,.ui-button[disabled]{color:#a0a5aa!important;border-color:#ddd!important;background:#f7f7f7!important;box-shadow:none!important;text-shadow:0 1px 0 #fff!important;cursor:default;transform:none!important}@media screen and (max-width:782px){.ui-button{padding:6px 14px;line-height:normal;font-size:14px;vertical-align:middle;height:auto;margin-bottom:4px}}.ui-dialog{position:absolute;top:0;right:0;z-index:100102;background-color:#fff;box-shadow:0 3px 6px rgba(0,0,0,.3)}.ui-dialog-titlebar{background:#fcfcfc;border-bottom:1px solid #dfdfdf;height:36px;font-size:18px;font-weight:600;line-height:36px;padding:0 16px 0 36px}.ui-button.ui-dialog-titlebar-close{background:0 0;border:none;box-shadow:none;color:#666;cursor:pointer;display:block;padding:0;position:absolute;top:0;left:0;width:36px;height:36px;text-align:center}.ui-dialog-titlebar-close:before{font:normal 20px/1 dashicons;vertical-align:top;speak:none;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:36px;width:36px;height:36px;content:"\f158"}.ui-button.ui-dialog-titlebar-close:hover{color:#00a0d2}.ui-dialog-titlebar-close .ui-button-text{display:none}.ui-dialog-content{padding:16px;overflow:auto}.ui-dialog-buttonpane{background:#fcfcfc;border-top:1px solid #dfdfdf;padding:16px}.ui-dialog-buttonpane .ui-button{margin-right:16px}.ui-dialog-buttonpane .ui-dialog-buttonset{float:left}.ui-draggable .ui-dialog-titlebar{cursor:move}.ui-widget-overlay{position:fixed;top:0;right:0;left:0;bottom:0;min-height:360px;background:#000;opacity:.7;filter:alpha(opacity=70);z-index:100101}
\ No newline at end of file
+ */.ui-resizable{position:relative}.ui-resizable-handle{position:absolute;font-size:.1px;display:block;touch-action:none}.ui-resizable-autohide .ui-resizable-handle,.ui-resizable-disabled .ui-resizable-handle{display:none}.ui-resizable-n{cursor:n-resize;height:7px;width:100%;top:-5px;right:0}.ui-resizable-s{cursor:s-resize;height:7px;width:100%;bottom:-5px;right:0}.ui-resizable-e{cursor:e-resize;width:7px;right:-5px;top:0;height:100%}.ui-resizable-w{cursor:w-resize;width:7px;left:-5px;top:0;height:100%}.ui-resizable-se{cursor:se-resize;width:12px;height:12px;right:1px;bottom:1px}.ui-resizable-sw{cursor:sw-resize;width:9px;height:9px;left:-5px;bottom:-5px}.ui-resizable-nw{cursor:nw-resize;width:9px;height:9px;left:-5px;top:-5px}.ui-resizable-ne{cursor:ne-resize;width:9px;height:9px;right:-5px;top:-5px}.ui-button{display:inline-block;text-decoration:none;font-size:13px;line-height:2;height:28px;margin:0;padding:0 10px 1px;cursor:pointer;border-width:1px;border-style:solid;-webkit-appearance:none;border-radius:3px;white-space:nowrap;box-sizing:border-box;color:#555;border-color:#ccc;background:#f7f7f7;box-shadow:0 1px 0 #ccc;vertical-align:top}.ui-button:active,.ui-button:focus{outline:0}.ui-button::-moz-focus-inner{border-width:0;border-style:none;padding:0}.ui-button:focus,.ui-button:hover{background:#fafafa;border-color:#999;color:#23282d}.ui-button:focus{border-color:#5b9dd9;box-shadow:0 0 3px rgba(0,115,170,.8)}.ui-button:active{background:#eee;border-color:#999;box-shadow:inset 0 2px 5px -3px rgba(0,0,0,.5);transform:translateY(1px)}.ui-button:disabled,.ui-button[disabled]{color:#a0a5aa!important;border-color:#ddd!important;background:#f7f7f7!important;box-shadow:none!important;text-shadow:0 1px 0 #fff!important;cursor:default;transform:none!important}@media screen and (max-width:782px){.ui-button{padding:6px 14px;line-height:normal;font-size:14px;vertical-align:middle;height:auto;margin-bottom:4px}}.ui-dialog{position:absolute;top:0;right:0;z-index:100102;background-color:#fff;box-shadow:0 3px 6px rgba(0,0,0,.3)}.ui-dialog-titlebar{background:#fcfcfc;border-bottom:1px solid #dfdfdf;height:36px;font-size:18px;font-weight:600;line-height:2;padding:0 16px 0 36px}.ui-button.ui-dialog-titlebar-close{background:0 0;border:none;box-shadow:none;color:#666;cursor:pointer;display:block;padding:0;position:absolute;top:0;left:0;width:36px;height:36px;text-align:center}.ui-dialog-titlebar-close:before{font:normal 20px/1 dashicons;vertical-align:top;speak:none;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.8;width:36px;height:36px;content:"\f158"}.ui-button.ui-dialog-titlebar-close:hover{color:#00a0d2}.ui-dialog-titlebar-close .ui-button-text{display:none}.ui-dialog-content{padding:16px;overflow:auto}.ui-dialog-buttonpane{background:#fcfcfc;border-top:1px solid #dfdfdf;padding:16px}.ui-dialog-buttonpane .ui-button{margin-right:16px}.ui-dialog-buttonpane .ui-dialog-buttonset{float:left}.ui-draggable .ui-dialog-titlebar{cursor:move}.ui-widget-overlay{position:fixed;top:0;right:0;left:0;bottom:0;min-height:360px;background:#000;opacity:.7;filter:alpha(opacity=70);z-index:100101}
\ No newline at end of file
diff --git a/wp-includes/css/jquery-ui-dialog.css b/wp-includes/css/jquery-ui-dialog.css
index 26a81a257a..831de2c8b9 100644
--- a/wp-includes/css/jquery-ui-dialog.css
+++ b/wp-includes/css/jquery-ui-dialog.css
@@ -182,7 +182,7 @@
 	display: inline-block;
 	text-decoration: none;
 	font-size: 13px;
-	line-height: 26px;
+	line-height: 2;
 	height: 28px;
 	margin: 0;
 	padding: 0 10px 1px;
@@ -272,7 +272,7 @@
 	height: 36px;
 	font-size: 18px;
 	font-weight: 600;
-	line-height: 36px;
+	line-height: 2;
 	padding: 0 36px 0 16px;
 }
 
@@ -298,7 +298,7 @@
 	speak: none;
 	-webkit-font-smoothing: antialiased;
 	-moz-osx-font-smoothing: grayscale;
-	line-height: 36px;
+	line-height: 1.8;
 	width: 36px;
 	height: 36px;
 	content: "\f158";
diff --git a/wp-includes/css/jquery-ui-dialog.min.css b/wp-includes/css/jquery-ui-dialog.min.css
index 6152122298..e14c8a3aad 100644
--- a/wp-includes/css/jquery-ui-dialog.min.css
+++ b/wp-includes/css/jquery-ui-dialog.min.css
@@ -15,4 +15,4 @@
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license.
  * http://jquery.org/license
- */.ui-resizable{position:relative}.ui-resizable-handle{position:absolute;font-size:.1px;display:block;touch-action:none}.ui-resizable-autohide .ui-resizable-handle,.ui-resizable-disabled .ui-resizable-handle{display:none}.ui-resizable-n{cursor:n-resize;height:7px;width:100%;top:-5px;left:0}.ui-resizable-s{cursor:s-resize;height:7px;width:100%;bottom:-5px;left:0}.ui-resizable-e{cursor:e-resize;width:7px;right:-5px;top:0;height:100%}.ui-resizable-w{cursor:w-resize;width:7px;left:-5px;top:0;height:100%}.ui-resizable-se{cursor:se-resize;width:12px;height:12px;right:1px;bottom:1px}.ui-resizable-sw{cursor:sw-resize;width:9px;height:9px;left:-5px;bottom:-5px}.ui-resizable-nw{cursor:nw-resize;width:9px;height:9px;left:-5px;top:-5px}.ui-resizable-ne{cursor:ne-resize;width:9px;height:9px;right:-5px;top:-5px}.ui-button{display:inline-block;text-decoration:none;font-size:13px;line-height:26px;height:28px;margin:0;padding:0 10px 1px;cursor:pointer;border-width:1px;border-style:solid;-webkit-appearance:none;border-radius:3px;white-space:nowrap;box-sizing:border-box;color:#555;border-color:#ccc;background:#f7f7f7;box-shadow:0 1px 0 #ccc;vertical-align:top}.ui-button:active,.ui-button:focus{outline:0}.ui-button::-moz-focus-inner{border-width:0;border-style:none;padding:0}.ui-button:focus,.ui-button:hover{background:#fafafa;border-color:#999;color:#23282d}.ui-button:focus{border-color:#5b9dd9;box-shadow:0 0 3px rgba(0,115,170,.8)}.ui-button:active{background:#eee;border-color:#999;box-shadow:inset 0 2px 5px -3px rgba(0,0,0,.5);transform:translateY(1px)}.ui-button:disabled,.ui-button[disabled]{color:#a0a5aa!important;border-color:#ddd!important;background:#f7f7f7!important;box-shadow:none!important;text-shadow:0 1px 0 #fff!important;cursor:default;transform:none!important}@media screen and (max-width:782px){.ui-button{padding:6px 14px;line-height:normal;font-size:14px;vertical-align:middle;height:auto;margin-bottom:4px}}.ui-dialog{position:absolute;top:0;left:0;z-index:100102;background-color:#fff;box-shadow:0 3px 6px rgba(0,0,0,.3)}.ui-dialog-titlebar{background:#fcfcfc;border-bottom:1px solid #dfdfdf;height:36px;font-size:18px;font-weight:600;line-height:36px;padding:0 36px 0 16px}.ui-button.ui-dialog-titlebar-close{background:0 0;border:none;box-shadow:none;color:#666;cursor:pointer;display:block;padding:0;position:absolute;top:0;right:0;width:36px;height:36px;text-align:center}.ui-dialog-titlebar-close:before{font:normal 20px/1 dashicons;vertical-align:top;speak:none;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:36px;width:36px;height:36px;content:"\f158"}.ui-button.ui-dialog-titlebar-close:hover{color:#00a0d2}.ui-dialog-titlebar-close .ui-button-text{display:none}.ui-dialog-content{padding:16px;overflow:auto}.ui-dialog-buttonpane{background:#fcfcfc;border-top:1px solid #dfdfdf;padding:16px}.ui-dialog-buttonpane .ui-button{margin-left:16px}.ui-dialog-buttonpane .ui-dialog-buttonset{float:right}.ui-draggable .ui-dialog-titlebar{cursor:move}.ui-widget-overlay{position:fixed;top:0;left:0;right:0;bottom:0;min-height:360px;background:#000;opacity:.7;filter:alpha(opacity=70);z-index:100101}
\ No newline at end of file
+ */.ui-resizable{position:relative}.ui-resizable-handle{position:absolute;font-size:.1px;display:block;touch-action:none}.ui-resizable-autohide .ui-resizable-handle,.ui-resizable-disabled .ui-resizable-handle{display:none}.ui-resizable-n{cursor:n-resize;height:7px;width:100%;top:-5px;left:0}.ui-resizable-s{cursor:s-resize;height:7px;width:100%;bottom:-5px;left:0}.ui-resizable-e{cursor:e-resize;width:7px;right:-5px;top:0;height:100%}.ui-resizable-w{cursor:w-resize;width:7px;left:-5px;top:0;height:100%}.ui-resizable-se{cursor:se-resize;width:12px;height:12px;right:1px;bottom:1px}.ui-resizable-sw{cursor:sw-resize;width:9px;height:9px;left:-5px;bottom:-5px}.ui-resizable-nw{cursor:nw-resize;width:9px;height:9px;left:-5px;top:-5px}.ui-resizable-ne{cursor:ne-resize;width:9px;height:9px;right:-5px;top:-5px}.ui-button{display:inline-block;text-decoration:none;font-size:13px;line-height:2;height:28px;margin:0;padding:0 10px 1px;cursor:pointer;border-width:1px;border-style:solid;-webkit-appearance:none;border-radius:3px;white-space:nowrap;box-sizing:border-box;color:#555;border-color:#ccc;background:#f7f7f7;box-shadow:0 1px 0 #ccc;vertical-align:top}.ui-button:active,.ui-button:focus{outline:0}.ui-button::-moz-focus-inner{border-width:0;border-style:none;padding:0}.ui-button:focus,.ui-button:hover{background:#fafafa;border-color:#999;color:#23282d}.ui-button:focus{border-color:#5b9dd9;box-shadow:0 0 3px rgba(0,115,170,.8)}.ui-button:active{background:#eee;border-color:#999;box-shadow:inset 0 2px 5px -3px rgba(0,0,0,.5);transform:translateY(1px)}.ui-button:disabled,.ui-button[disabled]{color:#a0a5aa!important;border-color:#ddd!important;background:#f7f7f7!important;box-shadow:none!important;text-shadow:0 1px 0 #fff!important;cursor:default;transform:none!important}@media screen and (max-width:782px){.ui-button{padding:6px 14px;line-height:normal;font-size:14px;vertical-align:middle;height:auto;margin-bottom:4px}}.ui-dialog{position:absolute;top:0;left:0;z-index:100102;background-color:#fff;box-shadow:0 3px 6px rgba(0,0,0,.3)}.ui-dialog-titlebar{background:#fcfcfc;border-bottom:1px solid #dfdfdf;height:36px;font-size:18px;font-weight:600;line-height:2;padding:0 36px 0 16px}.ui-button.ui-dialog-titlebar-close{background:0 0;border:none;box-shadow:none;color:#666;cursor:pointer;display:block;padding:0;position:absolute;top:0;right:0;width:36px;height:36px;text-align:center}.ui-dialog-titlebar-close:before{font:normal 20px/1 dashicons;vertical-align:top;speak:none;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.8;width:36px;height:36px;content:"\f158"}.ui-button.ui-dialog-titlebar-close:hover{color:#00a0d2}.ui-dialog-titlebar-close .ui-button-text{display:none}.ui-dialog-content{padding:16px;overflow:auto}.ui-dialog-buttonpane{background:#fcfcfc;border-top:1px solid #dfdfdf;padding:16px}.ui-dialog-buttonpane .ui-button{margin-left:16px}.ui-dialog-buttonpane .ui-dialog-buttonset{float:right}.ui-draggable .ui-dialog-titlebar{cursor:move}.ui-widget-overlay{position:fixed;top:0;left:0;right:0;bottom:0;min-height:360px;background:#000;opacity:.7;filter:alpha(opacity=70);z-index:100101}
\ No newline at end of file
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 55b8fb31ff..faa3cc15d5 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45470';
+$wp_version = '5.3-alpha-45471';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.