Brief summary of the bug. What is it ? Where is it ?

Getting an error when click on the Alerts tab on Fullscreen dashboard. 

Steps to reproduce:

1. Create a Dashboard
2. Make the dashboard Fullscreen
3. Click on Alerts tab 

Actual result :

Please have a look at the attachement.

Expected result:

It shouldn't give an error - or from my and Meggle's perspective Alerts tab shouldn't be on the Fullscreen - it is for viewing.