Insead of custom error dialogs try to use standard LO error
reporting & localization

Change-Id: I199c7770dd884a6c5d9b22075d22ab9a9f2037a8
Reviewed-on: https://gerrit.libreoffice.org/62779
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>