Classname: it ended up being used by more than browsers (e.g. to save/restore state, share common actions...). We could rename it, but I'm not sure what to. In fact this is about browsing in general (going back and forth between documents), not just webbrowsing.
Deprecate actionSlotMap() and port konqueror away from it. KF6: remove the Ptr from the name of actionSlotMapPtr().