Index: src/wp-admin/css/customize-controls.css
===================================================================
--- src/wp-admin/css/customize-controls.css	(revision 36615)
+++ src/wp-admin/css/customize-controls.css	(working copy)
@@ -807,6 +807,9 @@
 	position: relative;
 	text-align: center;
 	cursor: default;
+	border: 1px dashed #ccc; 
+ 	box-sizing: border-box; 
+ 	height: 40px !important; 
 }
 
 .customize-control-media .inner,
@@ -844,7 +847,7 @@
 .customize-control-header .inner,
 .customize-control-header .inner .dashicons {
 	line-height: 20px;
-	top: 10px;
+	top: 8px;
 }
 
 .customize-control-header .list .inner,