Customizer: Remove an overflow: hidden declaration to prevent cutting off the left and right edge focus style of the "Add a Menu" input field.

props paulwilde.
fixes #32680.
Built from https://develop.svn.wordpress.org/trunk@32825


git-svn-id: http://core.svn.wordpress.org/trunk@32796 1a063a9b-81f0-0310-95a4-ce76da25c4cd

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

@@ -832,7 +832,6 @@ body.adding-menu-items #customize-preview {
 .new-menu-section-content {
 	display: none;
 	padding: 15px 0 0 0;
-	overflow: hidden;
 	clear: both;
 }
 

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

@@ -832,7 +832,6 @@ body.adding-menu-items #customize-preview {
 .new-menu-section-content {
 	display: none;
 	padding: 15px 0 0 0;
-	overflow: hidden;
 	clear: both;
 }