Alternating rows in SvTreeListBox is not work correctly when insert, expand
or collapse. Now is work properly and set in Expert Configuration dialog.

Change-Id: I58b53ae59fa7f8d9de769342a0e1bad55de18f20
Reviewed-on: https://gerrit.libreoffice.org/17310Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>