Steps to reproduce:
1. Create a series
2. Open Recordings->Series in two browser tabs
3. In both tabs, delete the series (but do not yet confirm deletion)
4. Confirm deletion in one tab
5. Confirm deletion in the other tab
6. Press the "X" to close the error notification
7. Navigate to Recordings->Events
Actual Results:
The notification that has been closed now appears again
Expected Results:
When the user closes a notification, it should not re-appear
Workaround (if any):
Merged PR 1534 as commit 526e4be