string changes, graphic changes, general hash

BattlescapeState: move encumbered sign & change color
	- const & format
Camera: tweak isOnScreen()
DebriefingState: nikeCross needs min. 8 aLiens put down
ExplosionBState: remark Logger.h
Map: move encumbered sign & change color
MiniMapState & MiniMapView: try RMB close, fullscreen ...
	- is doable but has problems.
ProjectileFlyBState: const
GeoscapeCraftState: surface adj.

CommendationDecorations: fix 2 decorations
en-US: string changes