[SEBA-240] Better handling of Observable subscription and triggers to prevent the GUI to freeze when multiple notifications are received

Change-Id: I22380409bdb12d6661ff3fbc911d7412776d9e24
diff --git a/src/app/datasources/websocket/global.ts b/src/app/datasources/websocket/global.ts
index 54c7209..372821c 100644
--- a/src/app/datasources/websocket/global.ts
+++ b/src/app/datasources/websocket/global.ts
@@ -89,6 +89,7 @@
     }
 
     public list() {
+      this.$log.debug(`[WebSocket] Active subscriptions: ${this._events.observers.length}`);
       return this._events.asObservable();
     }