Customizer: Force top margin to be zero for a new created nav menu to avoid extra spacing.

props valendesigns.
fixes #32662.
Built from https://develop.svn.wordpress.org/trunk@33157


git-svn-id: http://core.svn.wordpress.org/trunk@33129 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/customize-nav-menus-rtl.css

@@ -449,6 +449,11 @@
 .reordering .menu-item-depth-10 > .menu-item-bar { margin-left: 150px; }
 .reordering .menu-item-depth-11 > .menu-item-bar { margin-left: 165px; }
 
+/* Forces top margin to be zero for new menu */
+.control-section-nav_menu.open .menu {
+	margin-top: 0 !important;
+}
+
 .control-section-nav_menu .menu .menu-item-edit-active {
 	margin-right: 0;
 }

wp-admin/css/customize-nav-menus.css

@@ -449,6 +449,11 @@
 .reordering .menu-item-depth-10 > .menu-item-bar { margin-right: 150px; }
 .reordering .menu-item-depth-11 > .menu-item-bar { margin-right: 165px; }
 
+/* Forces top margin to be zero for new menu */
+.control-section-nav_menu.open .menu {
+	margin-top: 0 !important;
+}
+
 .control-section-nav_menu .menu .menu-item-edit-active {
 	margin-left: 0;
 }