table not resizing when rows/columns added to it

I happened across a presentation whose table didn't resize when extra rows and
columns were added to it. It worked on a higher resolution machine, but not on
a 1024x768 one

Change-Id: I98a7a04bee0b0175174e6376e9ebc046b9eff2dc
(cherry picked from commit 88c3b4bbf005299203370efecbc09dd9d9d26a72)
Reviewed-on: https://gerrit.libreoffice.org/9129
Tested-by: David Tardon <dtardon@redhat.com>
Reviewed-by: David Tardon <dtardon@redhat.com>
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>