[REF] refactor sale_cancel_picking in order to give the posibility to inherit the behaviour easily
[FIX] fix the cancellation of order and clear cancel_log when duplicating the sale order
[REF] remove useless cancel of picking, indeed if the purchase line is in draft there is not picking linked
[REF] refactor sale_cancel_purchase in order to give the posibility to inherit the behaviour easily
[REF] use word unlink instead of cancel
[REF] refactor sale_cancel_mrp in order to give the posibility to inherit the behaviour easily
[FIX] Flake8
[FIX] Error, and some flake8
[FIX] Flake8
[FIX] Update Translation
[FIX] Update translation
[FIX] Update translation
Merge remote-tracking branch 'origin/7.0-sale-cancel-mrp' into 7.0_sd

Conflicts:
	sale_cancel_mrp/sale.py
Merge remote-tracking branch 'origin/7.0-sale-cancel-picking' into 7.0_sd

Conflicts:
	sale_cancel_picking/sale.py
Merge remote-tracking branch 'origin/7.0-sale-cancel-purchase' into 7.0_sd

Conflicts:
	sale_cancel_purchase/sale.py