Issue Summary

Dashboard owner will lose the ability to edit their dashboard if they are removed from a group that the dashboard was shared with.

Steps to Reproduce

1. Add dashboard owner to a group
2. Share their dashboard with this group
3. Remove the dashboard owner from the group

Expected Results

Dashboard owner should still be able to edit their dashboard within the dashboard page.

Actual Results

Dashboard owner no longer able to edit their dashboard within the dashboard page.

Workaround

Add the dashboard owner back to the group or go to the manage dashboard page and remove the group from the share.

Suggestion

1. Let the dashboard owner know via warning message that group needs to be removed from the share as it no longer exists or they no longer are part of that group before they can change the layout and add gadgets on the dashboard page.
2. Or silently remove the group from the dashboard share as the owner is no longer part of the group or the group no longer exists.