[PR] Mindhack rebalance

[Grutradle]

A traitor item made specifically for countering a single thing that security has does feel a bit odd, when most traitor items have a "general" use case.

I

  but arguably less since it's pretty easy to be certain that you've hit a security officer with an EMP.

I mean, if their unassuming or heavily distracted with other targets, plus about 40% of the player base knows how to swap the mode to EMP. 
and the EMP grenades at this point only get used by spys IF they really have nothing to do.