Prompt to Deactivate Heavy Weapons

Adds game option "Gameplay | Confirm deactivation of heavy weapon sustains", which adds an optional confirmation dialog when manually deactivating one of the Annihilators' heavy weapon sustained talents (Flamethrower, Shockstaff, Boltgun). [This is a concession to these talents' unusual "work flow" — activating the sustain triggers the first attack, but installs a separate talent to trigger subsequent attacks, which can lead to mistaken deactivation of the sustain in an attempt to attack.]

tome-hvy_wpn_warn.teaa

tome-hvy_wpn_warn.teaa