Merge pull request #1137 from FHenry/3.4

Defaulted PDF model document with default value (set in admin) for
Fix : Numbering on supplier invoice was not saved and on shipment displayed error when ok
Merge pull request #1138 from atm-maxime/3.4

Fix : Numbering on supplier invoice was not saved and on shipment displa...
Fix extrafeild thirdparty import and export
Merge branch '3.4' of https://github.com/Dolibarr/dolibarr.git into 3.4