Fixed: [ bug #1756 ] PHP error while removing an import profile
Because this is a legal issue (OPCA), i added the hidden constant for
3.7: WORKFLOW_PROPAL_CAN_CLASSIFY_BILLED_WITHOUT_INVOICES => Button
"Classified Billed" is visible on proposal even if there is no invoice
linked to proposal.
Fixed: Also fix get list of invoice that report too many data.
Merge branch '3.7' of git@github.com:Dolibarr/dolibarr.git into 3.7