Startup: clean up, clamp, backport from Gtk4

[danirabbit]

• Code style and cleanup
• Backport changes from Gtk 4 branch where possible
• Clamp the list so that switches aren't super far away on large displays

[lenemter]

On my 16" FHD laptop display the description text is small and barely readable. Can you make it larger somehow?

[danirabbit]

@lenemter I would suggest adjusting your text size settings since we use the small text class for description text pretty regularly 😅 For example this is already the case in the AppChooser and this branch just brings those two row styles into alignment. It's also used in the sidebar in the Permissions view etc

[lenemter]

@danirabbit I didn't notice they have the same size, I'll try to increase text size, thanks. Then it looks fine (btw it's pretty clever to use Clamp here 👍)