apps: Create some widgets with g_object_new
requested to merge automerisnaranja/gnome-control-center:g-object-new-static-permission-row-apps-panel into main
This simplifies the code. Also, remove halign=end from the "Remove File Type" and "Remove Link Types" buttons; this property isn't needed because these buttons are suffix widgets from the AdwActionRows they are in.
Edited by Automeris naranja