fix: #8838, fix chat dropdown timestamps

use shorthand like notification dropdown

public/src/modules/chat.js

@@ -3,7 +3,8 @@
 define('chat', [
 	'components',
 	'taskbar',
-], function (components, taskbar) {
+	'translator',
+], function (components, taskbar, translator) {
 	var module = {};
 	var newMessage = false;
 
@@ -20,6 +21,11 @@ define('chat', [
 				return room.teaser;
 			});
 
+			translator.toggleTimeagoShorthand(function () {
+				for (var i = 0; i < rooms.length; i += 1) {
+					rooms[i].teaser.timeago = $.timeago(new Date(parseInt(rooms[i].teaser.timestamp, 10)));
+				}
+				translator.toggleTimeagoShorthand();
 				app.parseAndTranslate('partials/chats/dropdown', { rooms: rooms }, function (html) {
 					chatsListEl.find('*').not('.navigation-link').remove();
 					chatsListEl.prepend(html);
@@ -45,6 +51,7 @@ define('chat', [
 					});
 				});
 			});
+		});
 	};