Save precious vertical space by removing some redundant heading labels

Change-Id: I6aaa7602f57f6cb2d0f9bc3ee897a9c3576d47d3
Reviewed-on: https://gerrit.libreoffice.org/12012
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>