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.