The motivation here is to concentrate display options in the GAL display
settings, ready for removal of legacy canvases. Instead of having the
property as a member of the DRAW_FRAME, with the GAL canvas retreiving
it from there, it is now in the GAL_DISPLAY_OPTIONS struct, and both GAL
and legacy get it from there.
The options for setting cursor shape are then moved out of the general
options dialog, and into the GAL display options widget, where they can
be used in all GAL-aware programs.
GAL cursor shape works on GAL, but not legacy, so the option is now
available on OSX (but only affects GAL, and is labelled as such).
This gives a bit more space to the GAL options in the left panel
Also tidy up some code style and unnecessary default arguments in the
GAL display planel widget.
A new items is added to the GAL display options (and the dialog), and a
hotkey (Ctrl+Shift+x) is added to toggle it.
Fixes: lp:1673633
* https://bugs.launchpad.net/kicad/+bug/1673633
The primary motivation here is to allow other GAL canvas users (eg
Modedit, and soon Gerbview) to be able to easily modify GAL canvas
options.
For now, this doesn't change the display properties dialog in
appearance, but if more GAL options are added, it might need a bit of
tweak and maybe tabs or similar, like Eeschema preferences.
John Beard