Okay, playing my lock at the moment .. I level a toon while grinding for buff food for my raiders
Anyway,
Test 1 - Pet Active .. no change of bar.
Test 2 - Pet Inactive .. no change of bar.
Test 3 - No nUI .. no change of bar
Looks like bliizard has decided you to drag the skills from your spellbook and put them on your action bar as normal
I smell a metamorphosis addon in my future