[IMP] mrp_production_quant_manual_assign: select lots to be consumed

this feature is only useful for MOs of final product that are
tracked by serial numbers.

mrp_production_quant_manual_assign/models/__init__.py

@@ -0,0 +1 @@
+from . import stock_move

mrp_production_quant_manual_assign/models/stock_move.py

@@ -0,0 +1,19 @@
+# Copyright 2021 ForgeFlow S.L. (http://www.forgeflow.com)
+# License AGPL-3 - See http://www.gnu.org/licenses/agpl-3.0.html
+
+from odoo import models
+from odoo.tools.float_utils import float_is_zero
+
+
+class StockMove(models.Model):
+    _inherit = "stock.move"
+
+    # While https://github.com/odoo/odoo/pull/74268 is not closed.
+    def _should_bypass_set_qty_producing(self):
+        res = super()._should_bypass_set_qty_producing()
+        if self.has_tracking != "none" and float_is_zero(
+            self.quantity_done, precision_rounding=self.product_uom.rounding
+        ):
+            # If some serial/lot has been selected to be consumed we don't change the selection.
+            return False
+        return res