Stop display of Animation if the Automatic Preview checkbox is not checked

Change-Id: Iee12b14ab71af4f7b658278ba9ea7b4108e2d64c
Reviewed-on: https://gerrit.libreoffice.org/22586Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>