It is not possible to unset { -brand-short-name } as the default client within { -brand-short-name }. To make another application the default you must use its “Set as default” dialog.
Non es possibile disfacer le selection de { -brand-short-name } como cliente predefinite in { -brand-short-name } mesme. Pro eliger un altere application como cliente predefinite, tu debe usar le dialogo “Render predefinite” de illo.