TinyMCE: Fix keyboard navigation when the dfw button is present but hidden. Ensure that button is added last in the DOM to match where it appears visually.

Props afercia, azaozz.
Fixes #46640.
Built from https://develop.svn.wordpress.org/trunk@45172


git-svn-id: http://core.svn.wordpress.org/trunk@44981 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/edit-rtl.css

@@ -1273,12 +1273,10 @@ table.links-table {
 /* DFW 2
 -------------------------------------------------------------- */
 
-#wp-content-wrap .mce-wp-dfw,
 #qt_content_dfw {
 	display: none;
 }
 
-.wp-editor-expand #wp-content-wrap .mce-wp-dfw,
 .wp-editor-expand #qt_content_dfw {
 	display: inline-block;
 }

wp-admin/css/edit.css

@@ -1273,12 +1273,10 @@ table.links-table {
 /* DFW 2
 -------------------------------------------------------------- */
 
-#wp-content-wrap .mce-wp-dfw,
 #qt_content_dfw {
 	display: none;
 }
 
-.wp-editor-expand #wp-content-wrap .mce-wp-dfw,
 .wp-editor-expand #qt_content_dfw {
 	display: inline-block;
 }

wp-admin/js/editor-expand.js

@@ -1473,12 +1473,20 @@
 				onPostRender: function() {
 					var button = this;
 
+					editor.on( 'init', function() {
+						if ( button.disabled() ) {
+							button.hide();
+						}
+					} );
+
 					$document
 					.on( 'dfw-activate.focus', function() {
 						button.disabled( false );
+						button.show();
 					} )
 					.on( 'dfw-deactivate.focus', function() {
 						button.disabled( true );
+						button.hide();
 					} )
 					.on( 'dfw-on.focus', function() {
 						button.active( true );