Replaces the headings/outline move action buttons in the tools area
with a toolbar to expose the main functions for the selected entry in
the content tree.
Change-Id: Iedb5b53375088a159d640fb986bfcf9376fa2072
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168174
Tested-by: Jenkins
Reviewed-by: Jim Raykowski <raykowj@gmail.com>
