apps: Use a dialog to show "App is not sandboxed" info
AdwBanners shouldn't have a custom child because this breaks the banner adaptiveness. Said that, use the default AdwBanner button which triggers a dialog to inform the user the consequences of running an unsandboxed app.
Screencast_from_2024-04-08_20-19-21
Closes #2975
Edited by Automeris naranja