Save Orbeon forms before send them

Summary:
The first form was longer to fill, so it was correctly autosaved.

For shorter forms, the autosave can not having been triggered before.

Anyway, a quick modification to a field just before submit should be saved too.

Test Plan: Deploy on Nasqueron Forms Orbeon instance

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D3141