Customizer: Avoid hiding 'Remove' buttons unrelated to custom headers.

props rzen, ehg.
fixes #27848.


git-svn-id: https://develop.svn.wordpress.org/trunk@28266 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/js/customize-views.js

@@ -70,7 +70,7 @@
 		},
 
 		setButtons: function() {
-			var elements = $('.actions .remove');
+			var elements = $('#customize-control-header_image .actions .remove');
 			if (this.model.get('choice')) {
 				elements.show();
 			} else {