[FIX] mrp: do not group bom by type anymore

Task : 2241471

addons/mrp/views/mrp_bom_views.xml

@@ -211,7 +211,7 @@
             <field name="domain">[]</field> <!-- force empty -->
             <field name="view_mode">tree,kanban,form</field>
             <field name="search_view_id" ref="view_mrp_bom_filter"/>
-            <field name="context">{'search_default_group_by_type': True, 'default_company_id': allowed_company_ids[0]}</field>
+            <field name="context">{'default_company_id': allowed_company_ids[0]}</field>
             <field name="help" type="html">
               <p class="o_view_nocontent_smiling_face">
                 Create a bill of materials