OpenTabletArtist v0.20.4

What's Changed

• fix: July 2+ review waves (#380–#404) by @TheSevenPens in #405
• docs: refresh macOS feasibility (#140) for expanded Windows surface by @TheSevenPens in #408
• UI polish + v0.20.4 (title-bar version, sidebar name, pen diagram, Scribble card) by @TheSevenPens in #409

Full Changelog: v0.20.3...v0.20.4