Import QR code via screenshot does not work
Description
When trying to use the screenshot utility to read a QR code the app fails to import the proper settings, and all fields remain empty.
Error
$ flatpak run com.belmoussaoui.Authenticator
INFO authenticator::application > Authenticator (com.belmoussaoui.Authenticator)
INFO authenticator::application > Version: 4.1.1 ()
INFO authenticator::application > Datadir: /app/share/authenticator
INFO authenticator::models::database > Running DB Migrations...
INFO authenticator::models::database > Database pool initialized.
INFO authenticator::widgets::camera > The camera state changed to NotFound
ERROR authenticator::widgets::accounts::add > Failed to scan from screenshot Failed to open /run/user/1000/doc/de4bb711/Screenshot-2.png