Bring back anti-air targetting

[obese pigeon]

Hullo, at the moment, setting a unit to "anti-air" targeting in the mekwars campaign engine does not propagate the setting to the megamek host where the game is launched and fought.

While generally this isn't an issue because VTOLs are few in number and don't pack significant weaponry, some VTOLs can actually be dangerous - eg those packing ER LL or Pulse LL.

I suggest re-enabling anti-air targeting to allow players the option to counter this.

[Brown Adept]

Agreed.