Projections window could re-use other components (Assignments/assignment panel?)

The list of projections is using the "old" design. Maybe we should switch to similar design as in assignments - delete button for single projections in the projection row.

Travelling to cog icon just to delete/add/disable/enable single projection is not the best way.

There is a lot of issues/improvements dedicated to projections window in JIRA, so we need to think before deciding.

I put this for 3.9 just to indicate this is at least partially UX.