TinyMCE: return focus to the editor after closing the image toolbar. Props afercia, see #27642.

git-svn-id: https://develop.svn.wordpress.org/trunk@30775 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/js/tinymce/plugins/wpeditimage/plugin.js

@@ -329,6 +329,7 @@ tinymce.PluginManager.add( 'wpeditimage', function( editor ) {
 	floatingToolbar.on( 'keydown', function( event ) {
 		if ( event.keyCode === 27 ) {
 			hide();
+			editor.focus();
 		}
 	} );