I thought it might be useful to add a chat text command for the disarm feat eg. /c disarm. The main motivation for this is the use of a whip.
I've always been frustrated by the fact that I can put disarm on my quickbar only when a whip is equipped. Then it disappears if I unequip the whip. This is particularly frustrating in the middle of a quest or in the heat of battle when I switch back to my whip only to find I need to go through a lengthy menu to find disarm again.
Obviously the feat would only be usable when the whip was equipped. An analogy is the following. If I have a weapon charm and I take it off, the spot on the quickbar where I put the "use weapon charm" does not disappear, however I cannot use that ability again until I re-equip the charm.
If there are other feats or abilities that work this way then please suggest them below. The coding should be similar so they might as well all be added at once.