Accept Merge Request #1692: (feature/sale_order_route_pick -> develop)

Merge Request: 修改退回工艺设计后再确认，采购单编程草稿状态

Created By: @胡尧
Accepted By: @胡尧
URL: https://jikimo-hn.coding.net/p/jikimo_sfs/d/jikimo_sf/git/merge/1692?initial=true

sf_sale/models/sale_order.py

@@ -346,7 +346,6 @@ class RePurchaseOrder(models.Model):
             server_product_process = []
             purchase_order = pp._get_surface_technics_purchase_ids()
             if purchase_order:
-                purchase_order.write({'state': 'draft'})
                 pp.purchase_id = [(6, 0, [purchase_order.id])]
             else:
                 server_template = self.env['product.template'].search(