[Sidebar view] Add arrow to list items which are parent/category items (!13) · Merge requests · Plasma / System Settings

That's what Discover does for list items which go to a sub-page when clicked, which I think is a nice touch and provides visual clarity for the user.

This commit implements the same thing for the System Settings sidebar's custom' list items.

Before:

After:

5.20? 5.21? Depends on whether you consider this a feature I guess.

[Sidebar view] Add arrow to list items which are parent/category items