- Settings > Files offers Source on every key except those a built-in panel of
another kind (Image) claims, so a plugin that alone claims a text extension
shows the same choices as the picker.
- Delete the unused isSourceFilePanel.
- The Markdown example warns with the file name when its unmount write fails,
rather than dropping the edit silently.
- Document that PluginFile stat fields are read at render time and that watch
or the read hooks are how a panel learns they changed.
Mohamed Boudra
cd102d08b6