* rough implementation of WS based event system for server side notifications of mutation
* fix test construction
* fix deadlock on event bus
* disable linter error
* add item mutation events
* remove old event bus code
* refactor event system to use composables
* refresh items table when new item is added
* fix create form errors
* cleanup unnecessary calls
* fix importer erorrs + limit fn calls on import
Former-commit-id: 2cbcc8bb1d
