Correct crash on Track Properties List, Right Click.
Correct crash on tide harmonic index file extension specified as lower case "idx".
Disable OnPaint() precessing while populating Quilt to improve performance.
Improve processing of National Texts in S57 ENCs
Improve performance of Layer Delete function.
3.3.910
Merge branch 'master' into refactoring

Conflicts:
	include/chcanv.h
	include/glChartCanvas.h
	include/navutil.h
	include/routeman.h
	src/Quilt.cpp
	src/TCDataSource.cpp
	src/TrackPropDlg.cpp
	src/chart/S57Chart.cpp
	src/chcanv.cpp
	src/glChartCanvas.cpp
	src/navutil.cpp
	src/routeman.cpp
	src/routemanagerdialog.cpp