Fixed the add many licences logic
Merge branch 'develop' of https://github.com/allegro/ralph_assets into fix-licences

Conflicts:
	src/ralph_assets/forms_sam.py
Fixed the add many licences logic and merge migrations
Fix default niw value in Licence
Default used value
Merge pull request #257 from quamilek/fix-licences

Fixed the add many licences logic