FIX: copy extrafields when creating order from propale and creating
invoice from order
check extrafields before inserting in DB
FIX: bad margin and buy_price calculation when total_ht = 0 (discount
100%) on a line
Merge pull request #2016 from altatof/3.5

FIX: copy extrafields when creating order from propale and creating
Fix bug 1692 Can't update phone_pro with the contact webservice
Merge pull request #2066 from altatof/fix_margin_recap

FIX: bad margin and buy_price calculation when total_ht = 0 (discount 100%) on a line
Merge pull request #2067 from frederic34/patch-2

Fix bug 1692 Can't update phone_pro with the contact webservice
Prepare 3.5.6
Merge branch '3.5' of github.com:Dolibarr/dolibarr into 3.5_bourguignon