Bundled Themes: Add missing RTL styles for to fix inconsistent margins on `.alignwide` and `.alignfull` items.

Fixes the inconsistent margins for alignwide and alignfull classes used on Cover Block when it is the first block on a page.

Props kthmd, utz119, nikhilbhansi, and sabernhardt.
Fixes #49435.

Built from https://develop.svn.wordpress.org/trunk@47846


git-svn-id: http://core.svn.wordpress.org/trunk@47622 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentytwenty/style-rtl.css

@@ -3508,6 +3508,11 @@ figure.wp-block-table.is-style-stripes {
 	margin: 4rem auto;
 }
 
+.post-inner .entry-content > .wp-block-cover.alignwide:first-child,
+.post-inner .entry-content > .wp-block-cover.alignfull:first-child {
+	margin-top: 0;
+}
+
 /* Font Families ----------------------------- */
 
 .entry-content {
@@ -5346,6 +5351,11 @@ a.to-the-top > * {
 		margin-right: 4rem;
 	}
 
+	.entry-content > .alignwide:first-child,
+	.entry-content > .alignfull:first-child {
+		margin-bottom: 8rem;
+	}
+
 	/* ENTRY MEDIA */
 
 	.alignfull > figcaption,

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-47845';
+$wp_version = '5.5-alpha-47846';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.