Disable the concurrency check in the error dialog in TUI
    
    The IpmiErrorDialog dialog is run by the error handler. The handler might
    be triggered by an error from a different thread. It is possible that we
    are already asking for a user input when we decide to show the dialog.
    That would violate the concurrency check, so disable it.
    
    Resolves: rhbz#2070920
    (cherry picked from commit 3900641cb65d35140304e118cf14fbdadb2184ca)