Release 2.0.42

Fix for incorrect handling of coordinates when controller is in inches mode (setting $13). Issue #283.
NOTE: Probing and gcode conversions/transforms are performed in metric (G21 active), probing with controller is in inches mode has only been lightly tested.
Workaround for MPos flyout not showing coordinates when number of axes > 3 plus fix for heightmap probing issues. Issue #279.
Cannot zero DRO in probing tab, causes exception. Issue #273.
Fix for lathe mode DRO display. Issue #270.
Fix for missing color selectors for 3D viewer in app setup. Issue #263.
Fix for inaccurate tool length offset calulated (Tool length offset tab). Issue #262.
Fix for issue with heightmap transform corrupting arcs. Issue #261.
Added View all submenu to SD card filelist popup menu, for getting an unfiltered list. Requires grblHAL controller with support for the $F+ command.
Improved handling for some grblHAL setting types.
Added Hungarian translation, thanks to @dobakszilard (issue #267).
Some minor changes and improvements.