make task file extension case insensitive
Merge branch 'LoadTask' of http://github.com/brunotl/LK8000
Reduce runtime log message for non testbench mode
	modified:   InputEvents.cpp
	modified:   LKAirspace.cpp
	modified:   LiveTracker.cpp
	modified:   MapDraw/OpenCloseTopology.cpp
	modified:   SaveLoadTask/LoadNewTask.cpp
	modified:   Terrain/OpenCreateClose.cpp
	modified:   Terrain/RasterTerrain.cpp
	modified:   Waypoints/Close.cpp
	modified:   Waypoints/Read.cpp
	modified:   WndProc.cpp
Manage and ignore event SHORTCLICK in RenderAirspace
	modified:   Draw/Multimaps/RenderAirspace.cpp