Customizer: Fix Copy button alignment in Share Preview.

Following the admin reskin, the Copy link button for sharing customizer previews was misaligned.

Override core button disabled styles to set transform and background properties. Fix shadow height.

Props mohitbsf, audrasjb, hbhalodia, huzaifaalmesbah, sajib1223, joedolson.
Fixes #64688.

git-svn-id: https://develop.svn.wordpress.org/trunk@61730 602fd350-edb4-49c9-b593-d223f7449a82

Author: joedolson

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

@@ -273,8 +273,9 @@ body.trashing #publish-settings {
 	margin: 0;
 	position: absolute;
 	top: 50%;
-	transform: translateY(-50%);
+	transform: translateY(-50%) !important;
 	right: 0;
+	background: #fff !important;
 }
 
 .preview-link-wrapper {
@@ -284,7 +285,7 @@ body.trashing #publish-settings {
 .customize-copy-preview-link:before,
 .customize-copy-preview-link:after {
 	content: "";
-	height: 32px;
+	height: 40px;
 	position: absolute;
 	background: #fff;
 	top: 0;