Drowning nerf

Removed drowning air display (not working)
Updated drowning damage back to 2 in all cases
Reactor balance & fixes

Updated reactor to increase power with instabilities so players want to
take the risk
Updated reactor offline state to remain unstable and loose its inerty
Fixed reactor texture glitches when exceeding limits (too unstable,
etc.)
Added reactor effective energy output for easier monitoring
Removed reactor usage as a battery (wip)
Minor fixes