Instead of duplicating the name and icon work, just bind it to the QAction itself. Also respect visibility of actions for KIOSK restriction.

It now uses System Settings app icon for "About System Settings" instead of "help-about", though.
Placed the following in kdeglobals

[KDE Action Restrictions]
action/configure=false

Action would no longer show up. It would never trigger as the action was disabled internally so this is purely cosmetic.