tdf#75256 Sifr enhancements

Making the can in fillcolor icons bigger and
swap the lower and top bars in the databarformatdialog icons.

Change-Id: I6302309982154ad569ebe1253eaed80ce3b7fde9
Reviewed-on: https://gerrit.libreoffice.org/18281Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Reviewed-on: https://gerrit.libreoffice.org/18325