Description of problem:
When a user tries to clear all notifications, some stragglers are left behind. A second use of "Delete All" clears them.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.  Add a new org, "foobar_org"
2.  Add a new user, "foobar_user"
3.  Add a new user, "bazquux_user"
4.  Navigate to notifications view
5.  Delete all
  
Actual results:
Some, but not all, notifications are deleted - I think two remain behind, generally

Expected results:
All are cleared.

Additional info: