v0.6.8

Final improvements to the hover-to-show-variation feature (off by default, there's a menu command for it or use config option hover_draw).

If you want to conveniently edit config.json, most settings can be toggled in Nibbler's menus, and you can then save them to a new config.json file from the App menu. (One day I might get round to automatic preference saving. Not today.)