v0.21.0

A selection of improvements and fixes; you can now merge models with any model in the directory tree above them (handy if you have empty directories in the middle). Library scanning will be much faster as unchanged files are ignored, and some visual glitches in listing pages are gone.

What's Changed

• Choose which parent to merge a model into if there are a few options by @Floppy in #568
• fix: 🐛 no preview model layout shift in grid by @philstenning in #567
• Filter out existing files at the start of library scan by @Floppy in #570

Full Changelog: v0.20.0...v0.21.0