Settings was a NavigationLink pushed inside the 320pt menu-bar popover, so the
grouped form was cramped and most controls sat below a non-obvious scroll (and
showed a confusing "< Settings" back arrow). Add SettingsWindow (same standalone
NSWindow pattern as the Editor/Templates windows) and open it from the menu-bar
"Settings…" button. Drop the now-unused NavigationStack and the 320pt cap so the
form uses real window width with normal macOS spacing; window is resizable.
Grant Gilliam
d9e8c6ceab