cws mba34issues01: #i117709#: make sure that parent of error message box is visible
    Patch contributed by Mathias Bauer
    http://svn.apache.org/viewvc?view=revision&revision=1172346
    i#119036 - improve user experience of certification dialog - only shown once
    Patch contributed by Oliver-Rainer Wittmann
    http://svn.apache.org/viewvc?view=revision&revision=1299727