[BE] Create items of custom type
This issue is a container for all the work involved for making creation of new items of a custom type work from the console.
It likely involves:
1. policies / abilities
2. Type handling in Create/Update Services
3. License checks
4. Checking whether the new type is properly exposed (should work)
5. Widgets, link restrictions etc. are properly delegated
6. Existing widgets work, detail view renders properly
issue