dlg-open-with: Use gtk_show_uri_on_window
Instead of using a GtkAppChooserDialog. gtk_show_uri_on_window works on Flatpak and sandboxed environments.
I don't know if I am missing something, but I would guess that opening multiple of these native dialogs at once could be problematic.
Fixes: #105 (closed)
Edited by Maximiliano