Menus: Remove 'sub item' label when removing the sub item's parent.

Props rnoakes3rd, adamsilverstein.
Fixes #37846.
Built from https://develop.svn.wordpress.org/trunk@38612


git-svn-id: http://core.svn.wordpress.org/trunk@38555 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/nav-menu.js

@@ -82,9 +82,12 @@ var wpNavMenu;
 				shiftDepthClass : function(change) {
 					return this.each(function(){
 						var t = $(this),
-							depth = t.menuItemDepth();
-						$(this).removeClass('menu-item-depth-'+ depth )
-							.addClass('menu-item-depth-'+ (depth + change) );
+							depth = t.menuItemDepth(),
+							newDepth = depth + change;
+						t.removeClass( 'menu-item-depth-'+ depth )
+							.addClass( 'menu-item-depth-'+ ( newDepth ) );
+						if ( newDepth == 0 )
+							t.find( '.is-submenu' ).hide();
 					});
 				},
 				childMenuItems : function() {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38611';
+$wp_version = '4.7-alpha-38612';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.