Hit b to see all actions you acquired and can acquire in the future.
Drag and drop needed (basic) actions to the second bar (reached by clicking on the "up" arrow next to the bar) and then customize them by rightclick->edit action.
Yes, it would be quite handy for the program to recognize which armor you´re wearing, but as each and every piece of armor is interchangeable and can be combined with any other piece of light/heavy/medium it would result in a HUGE load of new code for every possible combination to be considered. Not feasible in my opinion. There´d be simply too many possible combinations to code.
So, we´ll have to make do with clicking to a new handsbar by, well... hand.
Works fine for me, got a Melee bar, two magic bars, a craft bar, two forage bars. Just keep track of your actions by naming them appropriately. You´ll get confused if everythings namend "New Action X"
CU
Acridiel