Improvements and fixes for push notifications (#11507)

* Strip markdown from push notifications

* Revert "Strip markdown from push notifications"

This reverts commit 4741e584c6.

* correctly set type for mention push notifications

* Add unformattedText field to chat messages

* fiix lint errors

* Add check that markdown formatting is stripped from messages

* Add check for markdown formatting in messages.

website/server/models/group.js

@@ -634,7 +634,12 @@ schema.methods.sendChat = function sendChat (options = {}) {
           return;
         }
       }
-      sendPushNotification(member, { identifier: 'chatMention', title: `${user.profile.name} mentioned you in ${this.name}`, message });
+      sendPushNotification(member, {
+        identifier: 'chatMention',
+        title: `${user.profile.name} mentioned you in ${this.name}`,
+        message: newChatMessage.unformattedText,
+        payload: { type: this.type },
+      });
     });
   }
   return newChatMessage;