Fix minor welcome screen issues introduced by GTK4 migration
- Don't prevent changing the "dark" toggle when current theme is dark, this currently prevents switching to light theme completely
- Refresh the keyboard shortcut warning at startup
- Increase spacing around separators
The color of the separators is set to border-color by GTK default theme, which is (40, 40, 40) for dark theme. A lighter color would be better. I didn't find a color in the theme that works, and the .dark
/ .bright
classes are not set on the welcome screen.