[IMP] mrp: unbuild ui improvements

Add some tooltips and rename labels for lot and source_location fields.
More details in specific commits

Task link : https://www.odoo.com/web?#id=39843&action=327&model=project.task&view_type=form&menu_id=4720
Pad link : https://pad.odoo.com/p/r.c50cfff56ca538324f15214213c860d9

closes odoo/odoo#27017

addons/mrp/models/mrp_unbuild.py

@@ -37,18 +37,18 @@ class MrpUnbuild(models.Model):
         domain="[('product_id', '=', product_id), ('state', 'in', ['done', 'cancel'])]",
         states={'done': [('readonly', True)]})
     lot_id = fields.Many2one(
-        'stock.production.lot', 'Lot',
+        'stock.production.lot', 'Lot/Serial Number',
         domain="[('product_id', '=', product_id)]",
-        states={'done': [('readonly', True)]})
+        states={'done': [('readonly', True)]}, help="Lot/Serial Number of the product to unbuild.")
     has_tracking=fields.Selection(related='product_id.tracking', readonly=True)
     location_id = fields.Many2one(
-        'stock.location', 'Location',
+        'stock.location', 'Source Location',
         default=_get_default_location_id,
-        required=True, states={'done': [('readonly', True)]})
+        required=True, states={'done': [('readonly', True)]}, help="Location where the product you want to unbuild is.")
     location_dest_id = fields.Many2one(
         'stock.location', 'Destination Location',
         default=_get_default_location_dest_id,
-        required=True, states={'done': [('readonly', True)]})
+        required=True, states={'done': [('readonly', True)]}, help="Location where you want to send the components resulting from the unbuild order.")
     consume_line_ids = fields.One2many(
         'stock.move', 'consume_unbuild_id', readonly=True,
         string='Consumed Disassembly Lines')

addons/mrp/views/mrp_unbuild_views.xml

@@ -113,13 +113,13 @@
                         </div>
                         <group>
                             <group>
-                                <field name="product_id" domain="[('bom_ids', '!=', False)]"/>
+                                <field name="product_id" domain="[('bom_ids', '!=', False)]" attrs="{'readonly':[('mo_id','!=',False)]}" force_save="1"/>
                                 <field name="bom_id" domain="['|',
                                             ('product_id','=',product_id),
                                             '&amp;',
                                                 ('product_tmpl_id.product_variant_ids','=',product_id),
                                                 ('product_id','=',False),
-                                                ('type', '=', 'normal')]"/>
+                                                ('type', '=', 'normal')]" attrs="{'readonly':[('mo_id','!=',False)]}" force_save="1"/>
                                 <label for="product_qty"/>
                                 <div class="o_row">
                                     <field name="product_qty"/>