fixed: alternative implementation for confirm

`confirm` cannot be used in electron

js/cm-api.js

@@ -1,6 +1,6 @@
 import { api } from "../../scripts/api.js";
 import { app } from "../../scripts/app.js";
-import { sleep } from "./common.js";
+import { sleep, customConfirm } from "./common.js";
 
 async function tryInstallCustomNode(event) {
 	let msg = '-= [ComfyUI Manager] extension installation request =-\n\n';
@@ -22,8 +22,7 @@ async function tryInstallCustomNode(event) {
 		alert(msg);
 		return;
 	}
-
-	let res = confirm(msg);
+	const res = await customConfirm(msg);
 	if(res) {
 		if(event.detail.target.installed == 'Disabled') {
 			const response = await api.fetchApi(`/customnode/toggle_active`, {