Support multiple assignees on Issue Boards
!2912 (merged) adds extra flexibility to the Issue Boards. As an addition to persisting milestones on
boards (which works as a default filtering scope for issues), now we persist
Currently one can only select a single assignee on the Issue Board configuration.
The backend is already prepared with a 1:N relation on Board / Assignees, which is temporarily handled with a
This will need a frontend touch for displaying the multiple assignees in the board configuration modal.