Improve general task list and tests

I noticed once !393 (merged) was merged that general tasks had no visual feedback when selected. Starting from this I refactored a bit to arrive to this point where:

• I introduce a new component GeneralTaskItem is basically a non-editable TaskItem
• This component has small twists to fit the general tasks usecase: it allows a component icon and a tooltip. This was translated in the new GeneralTask type.
• I also expanded/improved the e2e tests to check most general tasks usecases