Do not let people change altitude in basic settings if there is no baroaltitude available.
No effect, in fact.
	modified:   dlgBasicSettings.cpp
(CC) Split GetVisualGlidePoints from DrawVisualGlide
	modified:   DrawVisualGlide.cpp
	new file:   GetVisualGlidePoints.cpp
	modified:   ../../../../Makefile
VisualGlide vertical line for bearing diff.
This bearing diff line is positioned in the approximated 0 degrees bearing diff, which means: your bearing.
	modified:   DrawVisualGlide.cpp
	modified:   ../../../../Docs/CHANGES_IN_LK31.TXT
VisualGlide printing on second line also the required glideratio (aka Efficiency Requested).
	modified:   DrawVisualGlide.cpp
	modified:   ../../../../Docs/CHANGES_IN_LK31.TXT