c9c5444 ui_tests: test cancel and delete without button

Authored and Committed by mreznik 6 years ago
    ui_tests: test cancel and delete without button
    
    Add "confirm_btn" to cancel dialog and if "None" return
    for confirmation with "Enter" key.
    
    https://pagure.io/freeipa/issue/7441
    
    Reviewed-By: Petr Vobornik <pvoborni@redhat.com>