I wouldn't say nobody. My game doesn't have any mods installed.
yeahThis basically implements the thing they have in MvM into the full game right?
It may look ugly, like Rvsz says, but it is useful if you need a quick uber to become aware of how much ammo the person you're healing has to see if it is a wise decision to uber with someone with a decent amount of ammo, or the worst fucking decision to uber a guy with 1 clip in his rocket launcher