Bugfixes and minor changes.

GENERAL
Testmode
-Added Scout to "-mk mercs" command.

Unit Selection Priorities
-Previously random, now obeys the following format:
--- Ultimate Heroes > Other Heroes > Most Elites > Marines > Most Mercs > T2 Mercs > T1 Mercs > Medi/Observer

Morphing Hero Gas Refund
-Fixed a bug where losing a morphing HT Archon, DT Archon, or Lurker would not fully refund the spent gas amount.

MARINE
No changes.

MERCENARY
No changes.

HERO
Commando
-Concussive Grenade base range increased to 9 from 8.5 (now outranges feedback and leech by about 3 levels).

ELITE
Minithor
-Barrage now slows units by a factor of 0.75 instead of stunning them.

TOOLTIPS
-Commando Snipe