Adapt work unit permission in additional files
Add license header
Adapt work unit permission in watcher test
Remove unclear test asserts
Fix activity contoller unit tests
Allow user and version format custom fields for work unit
Use work unit custom fields in views
Rename edit permission
Create work unit custom field in test
Adapt work unit edit permission
Direct work unti edit to issues controller
Adapt api response to changed interface
Use work unit class
Adapt time entry API test to work unit class
Fix reports test
Fix timelog test