* Update Items in Sumbit state can add new row
In Sales Order and Purchase Order when docstatus is submitted user can
use Update Item btn to add new child Items
* Remove unused code line
* Remove blocking db save thread line
* Remove Company as not standard Field in Purchase Order Item
* Minor indentation fix
* Add Unit Test, add new row in update_child_qty_rate
* Codacy fix
3d82b74ea4