Groups with multiple members don't get notifications.

Ready for review. I altered the Push Activity Sender to make sure it can also handle arrays, as we already got the correct users but it only took the first user.

Had the same issue, not having push notifications for multiple users, for example when content is created in a group. Providing this patch

Merged and will be landing in 2.0.7 and 2.1.5

Automatically closed - issue fixed for 2 weeks with no activity.