Apply momentjs hack for short relative times on mobile too

Split the moment hack out into its own file and put it in
ext.echo.ui, so it gets picked up by both the desktop and
the mobile modules.

Bug: T133134
Change-Id: Ic5b3e63fb6941a310d85ea7776447d1d7153cf91

Resources.php

@@ -67,6 +67,7 @@ $wgResourceModules += array(
 			'ooui/mw.echo.ui.MenuItemWidget.js',
 			'ooui/mw.echo.ui.FooterNoticeWidget.js',
 			'ooui/mw.echo.ui.NotificationsWrapper.js',
+			'ext.echo.moment-hack.js',
 		),
 		'styles' => array(
 			'ooui/styles/mw.echo.ui.overlay.less',

modules/ext.echo.init.js

@@ -1,5 +1,4 @@
 ( function ( mw, $ ) {
-	/*global moment:false */
 	'use strict';
 
 	mw.echo = mw.echo || {};
@@ -45,30 +44,8 @@
 					alertNotificationsModel,
 					unreadMessageCounter,
 					unreadAlertCounter,
-					momentOrigLocale = moment.locale(),
 					maxNotificationCount = mw.config.get( 'wgEchoMaxNotificationCount' );
 
-				// Set up new 'short relative time' locale strings for momentjs
-				moment.defineLocale( 'echo-shortRelativeTime', {
-					relativeTime: function ( number, withoutSuffix, key ) {
-						var keymap = {
-							s: 'seconds',
-							m: 'minutes',
-							mm: 'minutes',
-							h: 'hours',
-							hh: 'hours',
-							d: 'days',
-							dd: 'days',
-							M: 'months',
-							MM: 'months',
-							y: 'years',
-							yy: 'years'
-						};
-						return mw.msg( 'notification-timestamp-ago-' + keymap[ key ], mw.language.convertNumber( number ) );
-					} } );
-				// Reset back to original locale
-				moment.locale( momentOrigLocale );
-
 				// Overlay
 				$( 'body' ).append( mw.echo.ui.$overlay );
 

modules/ext.echo.moment-hack.js

@@ -0,0 +1,26 @@
+( function ( mw ) {
+	/*global moment:false */
+	'use strict';
+
+	var momentOrigLocale = moment.locale();
+	// Set up new 'short relative time' locale strings for momentjs
+	moment.defineLocale( 'echo-shortRelativeTime', {
+		relativeTime: function ( number, withoutSuffix, key ) {
+			var keymap = {
+				s: 'seconds',
+				m: 'minutes',
+				mm: 'minutes',
+				h: 'hours',
+				hh: 'hours',
+				d: 'days',
+				dd: 'days',
+				M: 'months',
+				MM: 'months',
+				y: 'years',
+				yy: 'years'
+			};
+			return mw.msg( 'notification-timestamp-ago-' + keymap[ key ], mw.language.convertNumber( number ) );
+		} } );
+	// Reset back to original locale
+	moment.locale( momentOrigLocale );
+} )( mediaWiki );