FIX: Coupling constraints for vehicles with single freight images and multiple liveries did not work.
CHANGE: Make more efficient use of space in the depot/replace windows (allows more constraints to be shown at once)
FIX: Pointer misalignment in the depot/replace windows from previous commit
Added: welt, which could misteriously miss without any complaints by my VC++ 2010.
Merge branch '11.x' into 12.x
Merge branch '12.x' into devel-new
Merge branch 'devel-new' into 112.5-merge

Conflicts:
	gui/components/gui_convoy_assembler.cc
	gui/components/gui_komponente.h
Merge branch '112.5-merge' of git://github.com/BerndGabriel/simutrans-experimental.git into 112.5-merge