[FIX] shopfloor_reception_mobile: bind cancel event in 'set quantity' screen

The logic for the cancel action was defined, but the event listener
was missing from the button template.

Author: nicolas-delbovier-acsone

shopfloor_reception_mobile/static/src/scenario/reception.js

@@ -154,7 +154,7 @@ const Reception = {
                                 <btn-back/>
                             </v-col>
                             <v-col class="text-center" cols="12">
-                                <cancel-button/>
+                                <cancel-button @cancel="state.on_cancel"/>
                             </v-col>
                         </v-row>
                     </div>