Allow to mark applications as adaptive
If an application is not marked as adaptive in the desktop file but fits the phone screen nevertheless we can mark it as adaptive. This is currently not possible via the ui
See https://gitlab.gnome.org/World/Phosh/phosh/-/blob/main/data/sm.puri.phosh.gschema.xml#L27 and https://social.librem.one/@agx/110396920332002299