constraints should be tied to the action and not the whole mapping

[sds100]

• This was requested because someone wanted to have multiple sets of actions and constraints for one fingerprint gesture. Maybe this can be satisfied by #698 ?

Ideas

• group multiple actions with one set of constraints

Developer TODO (don't remove)

• [x] create new branch. put issue number at start of name
• [ ] write tests before working on feature. put issue number in comment - [ ] do #752.
• [ ] change key map list items
• [ ] migrations
• [ ] migration tests
• [ ] update documentation
• [ ] let translators in Discord server know there are strings to translate
• [ ] squash and merge
• [ ] delete branch

[sds100]