Scaffolding for categories domain
Basic functionality and tests for the category entity
Category service and repository scaffolding and basic tests
Basic functionality and tests for the category service.
Integration test scaffolding for categories repository.
Basic integration tests for category service.
Ordering and moving category nodes within tree with unit tests for that.
Building recursive array tree with tests
Html tree builder with tests
Basic integration tests for content service.

Why we haven't done it earlier? it turned out to be not so difficult - we don't need to create content types to do testing - instead we can just use ready-made base content item for testing.

This was probably due to it being abstract at first :)
Add and remove multiple categories from content item at once.
Added a migration to create categories schema and link to meta items
Starting categories backend implementation
Doctrine annotation bug workaround
Service functionality to get flat tree
Create nested categories in backend
Better modal dialog controls
Categories deletion procedure
Forbid to nest category inside itself or its children
Reload category tree after category update