fixes #3178 invisible superpower charge bars in spectator mode
consistent spy disguise radar color override in spectator mode
make cash ticks consistent with per-player shroud and observers
Don't render unit ranks you are not supposed to see.
fixes #3181 GPS dots not visble in spectator mode
render powerdown indicator for observers
Don't apply palette modifiers on effects in C&C.

fixes #2778 unit veterancy symbol cloaking together with unit
Merge pull request #3263 from Mailaender/alliance-checks

Removed inconstencies in alliance checks