BUG: 400860
FIXED-IN: 18.12.0
Clean up the context menu for the places panel.
- Change Text "Show All Entries" -> "Show Hidden Places"
- Use State dependent icon (like hidden files)
- Disable instead of hide if not places are hidden.
- Toggle to unchecked if last item of group is unhidden.
Create a copy of this "Show Hidden Places" entry in the main dolphin menu View->Places.