Tooltips change on state change, and they were taken from another source.
Unify this to reuse the existing strings from the uno command.

Change-Id: I8ff6fc43bc0469f15c9e930695d950f6d664bfdf
Reviewed-on: https://gerrit.libreoffice.org/20629Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
(cherry picked from commit ba659f71)
Reviewed-on: https://gerrit.libreoffice.org/20631