improved prefill modifiers, engagement status for range attacks

[silentmark]

Improved prefill modifiers info will move the tooltip with details about prefill modifiers into dededicated location. It will also add number indicator about modifiers that actually affected the values. The same indicator will be also visible in the chat for GM users.

In addition, a new effect - combat engagement was added, to control prefill modifiers for range attacks - when shooter is engaged - he doesn't have bonuses from range. When shooter is shooting at engaged actor - he gets -20 penalty and risk to hit another engaged actor instead. This is fully optional, as engaged condition is not applied automatically.