Update state when graph cleared via UI (#88)

src/scripts/ui/menu/index.js

@@ -1,5 +1,6 @@
 // @ts-nocheck
 
+import { api } from "../../api";
 import { $el } from "../../ui";
 import { downloadBlob } from "../../utils";
 import { ComfyButton } from "../components/button";
@@ -112,6 +113,7 @@ export class ComfyAppMenu {
           ) {
             app.clean();
             app.graph.clear();
+            api.dispatchEvent(new CustomEvent("graphCleared"));
           }
         },
       })