Adds a glow to the aura if you can steal or purge the buff.
Slight modification to Continuity's mod:
You should try theirs first and see if it works for you. If it does, use that one, it's going to be more accurate. Also probably more up to date.
Currently Blizzard's API is bugged for at least some classes, so when we run an API call to get Aura information, it always tells us that auras are not dispellable. I play an Evoker and our only dispell is a pvp talent, so Blizzard's API tells us everything is not dispellable for an evoker.
This changes the mod so that instead of relying on Blizzard's API to determine if an aura is dispellable, we guess if it's dispellable based on the fact that it's magic, on an enemy, and is a buff. This means that certain non-dispellable buffs (Ghost Wolf for instance) will glow. I don't have a full list of non-dispellable magic buffs so I did not hard code them in, but it would probably be easy enough to add. If you run across individual instances that annoy you, you can add those buffs to your buff blacklist under "Buff Tracking" and they will no longer appear.