Close BroadChannel

aleksis/core/static/js/vue/components/core/CacheNotification.js

@@ -11,6 +11,9 @@ export default {
             this.cache = event.data === true;
         }
     },
+      destroyed(){
+        this.channel.close()
+      },
     template: `
     <message-box :value="cache" type="warning">
       {{ this.$root.django.gettext('This page may contain outdated information since there is no internet connection.') }}