Media: Clean-up some MediaElementJS CSS: no more needed after [40642].

See #40707, #32417, #39994, #39995, #30281.

Built from https://develop.svn.wordpress.org/trunk@40647


git-svn-id: http://core.svn.wordpress.org/trunk@40510 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/widgets-rtl.css

@@ -154,11 +154,6 @@
 	border: 1px solid #f00;
 }
 
-.wp-customizer .mejs-controls a:focus > .mejs-offscreen,
-.widgets-php .mejs-controls a:focus > .mejs-offscreen {
-	z-index: 2;
-}
-
 /* Widget Dragging Helpers */
 .widget.ui-draggable-dragging {
 	min-width: 100%;

wp-admin/css/widgets.css

@@ -154,11 +154,6 @@
 	border: 1px solid #f00;
 }
 
-.wp-customizer .mejs-controls a:focus > .mejs-offscreen,
-.widgets-php .mejs-controls a:focus > .mejs-offscreen {
-	z-index: 2;
-}
-
 /* Widget Dragging Helpers */
 .widget.ui-draggable-dragging {
 	min-width: 100%;

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40646';
+$wp_version = '4.8-alpha-40647';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.