Issue Summary

When you make changes in a mirror this will triggers notifications. If you open a mirrored card in the destination board( where the card was mirrored to) the notification indicator does not clear.

Notification icon will only clear if you navigate to the original board and open the card there. 

Steps to Reproduce

1. Go to the mirror card and start watching it
2. Make changes to the mirror card from a different account (this will trigger a notification}
3. Go to the mirror card on the destination board
4. See notification sign on the card
5. Open the mirror card on the destination board

Expected Results

The notification will be cleared

Actual Results

The notification icon stays after opening the card. Notification will only go away if you navigate to the source board and check the source card there. 

Workaround

Currently the notification for mirror card can only be cleared on the source board by opening the source card.