Fix referencing of this' clearRefresherInterval method

src/account/NetworkPage.vue

@@ -276,7 +276,7 @@
                             messages: this.messages,
                             errors: this.errors
                         });
-                        clearRefresherInterval(this.refresher);
+                        this.clearRefresherInterval(this.refresher);
                         this.stopRefresher = setInterval(() => this.stopRefreshStatus(this.user.uuid), 5000);
                     }
                 }