* Catch DoesNotExist error
* Move notificationtable function to js file
* Fix for custom metadata class
- Previously only worked if a POST or PUT action was available on the endpoint
- So, a ListAPIView endpoint would not actually work!
- Adding in a BulkDelete mixin to a ListAPIView caused failure
* Add unit test to ensure new OPTIONS metadata updates are checked
* Expand functionality of the existing BulkDelete mixin
- Allow deletion by custom filters
- Allow each implementing class to implement custom filters
- Adds more unit testing for BulkDelete mixin class
* Add bulk delete operation for Notification API
- Ensure users can only delete their *own* notifications
* Improve notification tables / buttons / etc
* Adds unit testing for bulk delete of notifications
- Fixed API permissions for notifications list endpoint
* Update BulkDelete operations for the StockItemTestResult table
* Use filters parameter in attachments table to ensure that only correct attachments are deleted
* JS linting
* Fixes for unit tests
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