Customize: Remove “Update” link for themes on multisite installs.

In [38887], installing themes in the Customizer was disabled for multisite installs. However, an update link continues to be displayed when a theme update is available. Clicking the link causes a JavaScript error.

This removes that update link because updates cannot actually be performed in the Customizer in this situation.

Reviewed by desrosj and azaozz.
Merges [45527] to the 5.2 branch.

Props desrosj, earnjam, mukesh27, audrasjb, garrett-eclipse.
Fixes #46997.
Built from https://develop.svn.wordpress.org/branches/5.2@45528


git-svn-id: http://core.svn.wordpress.org/branches/5.2@45339 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/customize/class-wp-customize-theme-control.php

@@ -93,8 +93,15 @@ class WP_Customize_Theme_Control extends WP_Customize_Control {
 				<div class="update-message notice inline notice-warning notice-alt" data-slug="{{ data.theme.id }}">
 					<p>
 						<?php
-						/* translators: %s: "Update now" button */
-						printf( __( 'New version available. %s' ), '<button class="button-link update-theme" type="button">' . __( 'Update now' ) . '</button>' );
+						if ( is_multisite() ) {
+							_e( 'New version available.' );
+						} else {
+							printf(
+								/* translators: %s: "Update now" button */
+								__( 'New version available. %s' ),
+								'<button class="button-link update-theme" type="button">' . __( 'Update now' ) . '</button>'
+							);
+						}
 						?>
 					</p>
 				</div>

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.2.2-RC1-45523';
+$wp_version = '5.2.2-RC1-45528';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.