Add new configuration in Airspace Warnings for Group Ack.
Acknowledging one airspace will then extend this confirmation to all of the airspaces having the same name and the same class.
This is particularly useful if flying in populated airspace areas where a single zone is splitted into several airspaces all logically connected.
	modified:   ../Data/Dialogs/dlgAirspaceWarningParams.xml
	modified:   ../Data/Language/ENG_HELP.TXT
	modified:   ../Data/Language/ENG_MSG.TXT
	modified:   ../Header/Globals.h
	modified:   ../Header/LKProfiles.h
	modified:   Dialogs/dlgAirspaceWarningParams.cpp
	modified:   Globals.cpp
	modified:   LKProfileLoad.cpp
	modified:   LKProfileResetDefault.cpp
	modified:   LKProfileSave.cpp
(CC) removed unused "changed"
	modified:   dlgAirspaceWarningParams.cpp
(CC) Rename ToggleOverlay call to ToggleMultimapOverlay
	modified:   ../Header/LKInterface.h
	modified:   InputEvents.cpp
	modified:   LKInterface/LKCustomKeyHandler.cpp
	modified:   LKInterface/LKInterface.cpp
Remove wrong assertion for the case DoNearest has reset the sorted nearest list.
	modified:   DrawVisualGlide.cpp
Recover from a possible assert, keep it for bugstop
	modified:   Calculations2.cpp
Fix startupstore testbench using integer instead of double for printing time value
	modified:   ../../Calc/Turning.cpp