Theme Installer: Show 'Preview' button for installed themes.

props adamsilverstein.
see #27055, see #27708.

Built from https://develop.svn.wordpress.org/trunk@28038


git-svn-id: http://core.svn.wordpress.org/trunk@27868 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/themes-rtl.css

@@ -1086,7 +1086,7 @@ body.folded .theme-overlay .theme-wrap {
 .theme-browser .theme .theme-installed:before {
 	content: '\f147';
 }
-.theme-browser .theme.is-installed .theme-actions,
+.theme-browser .theme.is-installed .theme-actions .button-primary,
 .theme-browser.rendered .theme.is-installed .more-details {
 	display: none !important;
 }

wp-admin/css/themes.css

@@ -1086,7 +1086,7 @@ body.folded .theme-overlay .theme-wrap {
 .theme-browser .theme .theme-installed:before {
 	content: '\f147';
 }
-.theme-browser .theme.is-installed .theme-actions,
+.theme-browser .theme.is-installed .theme-actions .button-primary,
 .theme-browser.rendered .theme.is-installed .more-details {
 	display: none !important;
 }

wp-admin/js/theme.js

@@ -390,7 +390,6 @@ themes.view.Theme = wp.Backbone.View.extend({
 
 		if ( this.model.get( 'installed' ) ) {
 			this.$el.addClass( 'is-installed' );
-			this.$el.unbind();
 		}
 	},