remove newManufacture combobox

TransferItemsState: put in unresearched items + qty strings
TileEngine: superficial fix to blockage()
TransferItemsState: cleanup

BattlescapeGame
Pathfinding
UnitWalkBState
	- massage ALT forced walkage
	- allow dash 1 tile vertical
	- fixup plop sound when falling.
	Currently, forced fall uses no TU ....