as in interim measure for SfxTabDialogs we throw
away the TabPage if its not suitable for reuse

Change-Id: Ic5776ca3d2a8cb6bf41f33df01b211f81c62a842
Reviewed-on: https://gerrit.libreoffice.org/43134Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>