Customize: Add button in Publish Settings to discard unsaved changes (including drafted and scheduled), reverting Customizer to the last published state.

Props westonruter, melchoyce.
Amends [41667].
See #39896, #21666.

Built from https://develop.svn.wordpress.org/trunk@41694


git-svn-id: http://core.svn.wordpress.org/trunk@41528 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize-manager.php

@@ -3639,7 +3639,7 @@ final class WP_Customize_Manager {
 			</div>
 		</script>
 		<script type="text/html" id="tmpl-customize-trash-changeset-control">
-			<button type="button" class="button-link button-link-delete"><?php _e( 'Trash unpublished changes' ); ?></button>
+			<button type="button" class="button-link button-link-delete"><?php _e( 'Discard changes' ); ?></button>
 		</script>
 		<?php
 	}

wp-includes/script-loader.php

@@ -574,7 +574,7 @@ function wp_default_scripts( &$scripts ) {
 		'themeDownloading'   => __( 'Downloading your new theme…' ),
 		'themePreviewWait'   => __( 'Setting up your live preview. This may take a bit.' ),
 		'revertingChanges'   => __( 'Reverting unpublished changes…' ),
-		'trashConfirm'       => __( 'Are you sure you would like to discard your unpublished changes?' ),
+		'trashConfirm'       => __( 'Are you sure you’d like to discard your unpublished changes?' ),
 		/* translators: %s: URL to the Customizer to load the autosaved version */
 		'autosaveNotice'     => __( 'There is a more recent autosave of your changes than the one you are previewing. <a href="%s">Restore the autosave</a>' ),
 		'videoHeaderNotice'  => __( 'This theme doesn\'t support video headers on this page. Navigate to the front page or another page that supports video headers.' ),

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41693';
+$wp_version = '4.9-alpha-41694';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.