Administration: Fix minor misalignments caused by the `button-link` CSS class.

After [40059] the CSS class `button-link` uses `text-align: left` by default.
This change now requires to limit as much as possible the use of `button-link`
to controls that should really look like links and to explicitly set
`text-align: center` in a few other cases.

Fixes #39983.

Merges [40358] to the 4.7 branch.


git-svn-id: https://develop.svn.wordpress.org/branches/4.7@40367 602fd350-edb4-49c9-b593-d223f7449a82

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

@@ -161,6 +161,7 @@
 	outline: none;
 	overflow: hidden;
 	cursor: pointer;
+	text-align: center;
 }
 
 .wp-customizer .menu-item.menu-item-edit-active .item-edit .toggle-indicator:after {
@@ -532,6 +533,7 @@
 	box-shadow: none;
 	outline: none;
 	cursor: pointer;
+	text-align: center;
 }
 
 #available-menu-items .accordion-section-title .no-items,
@@ -623,6 +625,7 @@
 	box-shadow: none;
 	outline: none;
 	cursor: pointer;
+	text-align: center;
 }
 
 #available-menu-items .menu-item-handle .item-add:focus {

src/wp-includes/css/media-views.css

@@ -183,15 +183,28 @@
 	right: 0;
 	width: 50px;
 	height: 50px;
+	margin: 0;
 	padding: 0;
+	border: 1px solid transparent;
+	background: none;
+	color: #666;
 	z-index: 1000;
+	cursor: pointer;
+	outline: none;
 	-webkit-transition: color .1s ease-in-out, background .1s ease-in-out;
 	transition: color .1s ease-in-out, background .1s ease-in-out;
 }
 
+.media-modal-close:hover,
 .media-modal-close:active {
-	-webkit-box-shadow: none;
-	box-shadow: none;
+	color: #00a0d2;
+}
+
+.media-modal-close:focus {
+	color: #00a0d2;
+	border-color: #5b9dd9;
+	-webkit-box-shadow: 0 0 3px rgba( 0, 115, 170, .8 );
+	box-shadow: 0 0 3px rgba( 0, 115, 170, .8 );
 }
 
 .media-modal-close span.media-modal-icon {
@@ -205,15 +218,6 @@
 	vertical-align: middle;
 	-webkit-font-smoothing: antialiased;
 	-moz-osx-font-smoothing: grayscale;
-	color: #666;
-}
-
-.media-modal-close:hover .media-modal-icon:before {
-	color: #00a0d2;
-}
-
-.media-modal-close:active {
-	outline: 0;
 }
 
 .media-modal-content {

src/wp-includes/css/wp-auth-check.css

@@ -92,6 +92,7 @@
 	height: 22px;
 	width: 22px;
 	color: #72777c;
+	text-align: center;
 }
 
 #wp-auth-check-wrap .wp-auth-check-close:before {

src/wp-includes/media-template.php

@@ -163,7 +163,7 @@ function wp_print_media_templates() {
 
 	<script type="text/html" id="tmpl-media-modal">
 		<div class="<?php echo $class; ?>">
-			<button type="button" class="button-link media-modal-close"><span class="media-modal-icon"><span class="screen-reader-text"><?php _e( 'Close media panel' ); ?></span></span></button>
+			<button type="button" class="media-modal-close"><span class="media-modal-icon"><span class="screen-reader-text"><?php _e( 'Close media panel' ); ?></span></span></button>
 			<div class="media-modal-content"></div>
 		</div>
 		<div class="media-modal-backdrop"></div>