It should be possible to store and to release configurations for notifications from the API

Current Behavior:

• Users can make use of the API to store the configuration for notifications with an API call ./joc/api/notification/store.
• Configurations that have been added or updated from the API can later on be successfully released in the GUI from the Configuration->Notifications sub-view.
• If releasing is not performed from the GUI but from the API using the call ./joc/api/notification/release with an empty body or the body 

{ "objectType": "NOTIFICATION" }

then the configuration later on is not visible in the GUI. Instead, when opening the Configuration->Notifications sub-view then an "hourglass" is displayed endlessly.

Desired Behavior:

• Configurations for notifications that are stored and released by the API should be visible in the GUI.