fdo#84909 move zoom to object and added/hid/unhid some other buttons

Change-Id: I5235c790f7e9b755ef57a9e6643b049ea802ec30
Reviewed-on: https://gerrit.libreoffice.org/13064
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>