superposition : resolved the three stage rocket pushaside syndrome

src/App.vue

@@ -35,6 +35,7 @@ export default {
                                     'concernements_loaded',
                                     'concernementsByID',
                                     'allSuperpositions_byid',
+                                    'allMapItems_byid',
                                     'opened_recit']),
   },
   watch: {
@@ -104,17 +105,20 @@ export default {
               if (i === 1) {
                 mapitem.superposition_ids.push(superposition_id)
               }else{
-                this.mapitems.push({
+                let mapitem_superposition = {
                   id: `${concernement.id}___${superposition_id}`,
                   concernement: concernement,
                   superposition_ids: [superposition_id],
                   clone: true
-                });
+                };
+                this.mapitems.push(mapitem_superposition);
+                this.allMapItems_byid[mapitem_superposition.id] = mapitem_superposition;
               }
             }
           }
         });
         this.mapitems.push(mapitem)
+        this.allMapItems_byid[mapitem.id] = mapitem;
       }
       console.log('App mapitems', this.mapitems);
     }