Add support for Commandment, Reach, and various gem mods

[Blitz54]

Description of the problem being solved:

• Arc gem has a display only mod for the quality.
• Ball lighting has hitTimeOverride.
• Galvanic Field has 20% BASE shock chance, and hitTimeOverride using the 0.5 seconds and that is how often the beam can hit a single target. The beam casts more often itself, but we care about single target damage.
• Reach gives more area of effect all the time, but the attack gets 80% LESS accuracy if enemy is within 2m (20 units).
• Tremors applies less damage, aftershock mods not touched.
• Commandment support gives 100% INC cooldown recovery for Commandable skills, and deals no damage with non-commandable skills.