method for opening submap added

frontend-js/src/main/js/plugin/MinervaPluginProxy.js

@@ -391,6 +391,9 @@ function createProjectMap(options) {
         throw new Error("Unknown modelId: " + params.modelId);
       }
       return submap.setZoom(params.zoom);
+    },
+    openMap: function (params) {
+      return map.openSubmap(params.id);
     }
   }
 }