Administration: Make the Screen Options available on small screens.

Previously, the Screen Options toggle and the related panel content 
were hidden on small screens, preventing access to important settings,
including the ability to toggle the meta boxes visibility.

Props chetan200891.
Fixes #40985.

Built from https://develop.svn.wordpress.org/trunk@42644


git-svn-id: http://core.svn.wordpress.org/trunk@42473 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/common-rtl.css

@@ -3694,8 +3694,7 @@ img {
 	}
 
 	/* Hidden Elements */
-	#screen-meta,
-	#screen-meta-links,
+	#contextual-help-link-wrap,
 	#collapse-menu,
 	.post-format-select {
 		display: none !important;

wp-admin/css/common.css

@@ -3694,8 +3694,7 @@ img {
 	}
 
 	/* Hidden Elements */
-	#screen-meta,
-	#screen-meta-links,
+	#contextual-help-link-wrap,
 	#collapse-menu,
 	.post-format-select {
 		display: none !important;