Fix desktop notification click handler for existing/new GMs (#5633)

webapp/stores/notification_store.jsx

@@ -71,7 +71,8 @@ class NotificationStoreClass extends EventEmitter {
             if (!channel) {
                 title = msgProps.channel_display_name;
                 channel = {
-                    name: msgProps.channel_name
+                    name: msgProps.channel_name,
+                    type: msgProps.channel_type
                 };
             } else if (channel.type === Constants.DM_CHANNEL) {
                 title = Utils.localizeMessage('notification.dm', 'Direct Message');

webapp/utils/utils.jsx

@@ -104,7 +104,7 @@ export function notifyMe(title, body, channel, teamId, duration, silent) {
                     var notification = new Notification(title, {body, tag: body, icon: icon50, requireInteraction: notificationDuration === 0, silent});
                     notification.onclick = () => {
                         window.focus();
-                        if (channel && channel.type === Constants.DM_CHANNEL) {
+                        if (channel && (channel.type === Constants.DM_CHANNEL || channel.type === Constants.GM_CHANNEL)) {
                             browserHistory.push(TeamStore.getCurrentTeamUrl() + '/channels/' + channel.name);
                         } else if (channel) {
                             browserHistory.push(TeamStore.getTeamUrl(teamId) + '/channels/' + channel.name);