Customizer: Trim whitespace from custom link URLs.

This complements a similar fix for the Menus screen in [45655].

Props donmhico, audrasjb.
Merges [45869] to the 5.2 branch.
Fixes #47888. See #47723.
Built from https://develop.svn.wordpress.org/branches/5.2@45870


git-svn-id: http://core.svn.wordpress.org/branches/5.2@45681 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-nav-menus.js

@@ -544,6 +544,7 @@
 			var menuItem,
 				itemName = $( '#custom-menu-item-name' ),
 				itemUrl = $( '#custom-menu-item-url' ),
+				url = itemUrl.val().trim(),
 				urlRegex;
 
 			if ( ! this.currentMenuControl ) {
@@ -567,14 +568,14 @@
 			if ( '' === itemName.val() ) {
 				itemName.addClass( 'invalid' );
 				return;
-			} else if ( ! urlRegex.test( itemUrl.val() ) ) {
+			} else if ( ! urlRegex.test( url ) ) {
 				itemUrl.addClass( 'invalid' );
 				return;
 			}
 
 			menuItem = {
 				'title': itemName.val(),
-				'url': itemUrl.val(),
+				'url': url,
 				'type': 'custom',
 				'type_label': api.Menus.data.l10n.custom_label,
 				'object': 'custom'

wp-admin/js/nav-menu.js

@@ -944,7 +944,7 @@
 		},
 
 		addCustomLink : function( processMethod ) {
-			var url = $('#custom-menu-item-url').val(),
+			var url = $('#custom-menu-item-url').val().trim(),
 				label = $('#custom-menu-item-name').val();
 
 			processMethod = processMethod || api.addMenuItemToBottom;

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.2.3-alpha-45868';
+$wp_version = '5.2.3-alpha-45870';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.