openuri: Use a default threshold of 3
openuri: Use a default threshold of 3

Only ask the user 3 times if he keeps picking
the same app. After 3 times, we just use the
previous choice.

matthiasclasen/xdg-desktop-portal,matthiasclasen/xdg-desktop-portal,flatpak/xdg-desktop-portal,flatpak/xdg-desktop-portal,flatpak/xdg-desktop-portal,flatpak/xdg-desktop-portal,matthiasclasen/xdg-desktop-portal,matthiasclasen/xdg-desktop-portal,matthiasclasen/xdg-desktop-portal