[BUGFIX] Use original page UID to determine 'active' state

Shortcuts in menus are not considered 'active' for ´´useShortcutData="TRUE"´´ and ´´useShortcutUid="TRUE"´´ if they are parents of a subtree.
Merge pull request #207 from bjo3rnf/menufix

[BUGFIX] Use original page UID to determine 'active' state