If make has only one model, automatically select that model.
Merge remote-tracking branch 'upstream/development' into development
Modified code so that the 'quality' presets and 'material' presets windows can be opened and edited at the same time.
added cancel button to about window
Made it possible to show and hide the grid in 3d gcode view.
Made the post load processing on gcode files happen in a background thread so as not to lock up the ui.
Merge remote-tracking branch 'Greg/development' into development