Can I get /cancel_spellcast on click-to-heals?

[mschwab]

I notice the click-to-cure buttons (persona, group, or raid windows) have a /cancel_spellcast option, and I definitely use that.

Is there a way to get /cancel_spellcast added to the click-to-heal buttons? (group and raid windows) If I am pressing those buttons (instead of my usual group or tank heal), it's because I want to heal someone in a hurry (not wait until after Starfire or something else casts).