Activate method modeling panel when model editor is opened (#3011)

extensions/ql-vscode/src/model-editor/modeling-store.ts

@@ -67,7 +67,7 @@ export class ModelingStore extends DisposableObject {
       inProgressMethods: new Set(),
     });
 
-    this.modelingEvents.fireDbClosedEvent(dbUri);
+    this.modelingEvents.fireDbOpenedEvent(dbUri);
   }
 
   public setActiveDb(databaseItem: DatabaseItem) {