I didn't have much time so far, but I managed to code a first version for you test:
ActiveWeaponIcon
It shows the icon of the weapon next to the crosshair and colors it either red or green, depending on the weapon set.
Well, I hope it does that, I'm not yet level 15 to actually test it
Feel free to comment.
Still working on making it movable and I can't actually extract the real weapon type, so you need to put the heal weapon into the right weapon set.