[DMP Review] Automatically activate new tasks for existing projects

[MyPyDavid]

Rationale / Begründung

When creating a new task for a specific catalog, it should be visible for existing projects right away

At the moment new created tasks are not automatically visible in existing projects. Instead users need to activate them manually. Since users won't check the list of available tasks for their project regularly, they won't see those new tasks.

Affected

Users

Minimal functionality

• New tasks should automatically be added to existing projects

Nice-to-have functionality

• messages to the users when new tasks are available

References / Verweise

• https://github.com/search?q=repo%3Ardmorganiser%2Frdmo+%5BDMP+Review%5D&type=issues
• similar to feature in #431 and #345