no $$ when checking isEmpty()
no $$ when checking isEmpty()

eworm-de/yubikey-personalization-gui,eworm-de/yubikey-personalization-gui,Yubico/yubikey-personalization-gui,eworm-de/yubikey-personalization-gui,Yubico/yubikey-personalization-gui,Yubico/yubikey-personalization-gui