Revert "Save model with latest version of Gaphor"
Revert "Save model with latest version of Gaphor"

This reverts commit 05cf2802

Signed-off-by: Dan Yeaw <2591e5f46f28d303f9dc027d475a5c60d8dea17a@yeaw.me>

amolenaar/gaphor,amolenaar/gaphor