Mandatory flags added to the statusbar

Change-Id: I2605c76d579aa50efb953a475aacbc5e3a6e3abb
Reviewed-on: https://gerrit.libreoffice.org/56859
Tested-by: Jenkins
Reviewed-by: Vasily Melenchuk <vasily.melenchuk@cib.de>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>