Properties window: use AdwPreferencesPage and AdwPreferencesGroup
Similar to #3183 (closed), the properties window .ui code can be simplified a lot by using libadwaita widgets such as AdwPreferencesPage and AdwPreferencesGroup:
- Using GtkScrolledWindow and AdwClamp will be unnecessary with AdwPreferencesPage
- Using the boxed-list style for rows and using several margins will be unnecessary with AdwPreferencesGroup
Edited by Automeris naranja