removed map center custom key from configuration dialog

multiselection longclicktime adjustable, same time as in custom key dialog
Draw disabled airspaces grey
correct sector pictorial is task start is a sector
if ((*it)->DrawStyle()) does not work correct when in Multimaps

load airspaces with less than 4 points, needed for obstacles defined as airspaces
removed compiler warning
repositioned "Move" button
Airspaces of interest now work in Multimaps
Pictorial for airspace warning dialog re-enabld
removed AAT Target dialog due to problems with map
extended search range for multiselect check for zero bitmap
Revert point.size threshold while loading in LKAirspace, leave 3 points as limiter
	modified:   LKAirspace.cpp
Fix type mismatch in dlgTextEntry keyboard
	modified:   Dialogs/dlgTextEntry_Keyboard.cpp
Fix type cast
	modified:   dlgTextEntry_Keyboard.cpp