[template]
Working notes on mozilla/pontoon#3368, generalizing the multiple team selector into a reusable multiple item selector.
Summary
The team selector had grown into a component that only knew about teams, even though the same multi-select behavior was useful elsewhere. The refactor pulls the team-specific parts out and turns it into a generic item selector, so the control can be reused for other kinds of options without duplicating the logic.
The full working notes are in the embedded PDF below.