Ticket #20843: 20843.diff

wp-admin/css/customize-controls.dev.css

@@ -281 +281 @@
         z-index: 1;
 }
 
-.customize-control.open .dropdown-arrow:after {
-        border-width: 0 4px 4px 4px;
-        margin-top: -2px;
-}
-
 .customize-section .dropdown:hover .dropdown-content,
 .customize-control .dropdown:hover .dropdown-arrow {
         border-color: #aaa;