E.g. 'Error' for error boxes instead of just 'LibreOffice 6.0'

Change-Id: I7142d15e9219a2aa6733523887cdf43b50200b7b
Reviewed-on: https://gerrit.libreoffice.org/39284Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>