Highlighting is character level while background color is paragraph/cell level.
Use different uno commands/icons/texts for the two.
Change-Id: I79264fcdcd968734b68278f69450a377d6607323
Reviewed-on: https://gerrit.libreoffice.org/72786
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
