Fix double trigger of setting onChange callback (#1385)

* Fix onChange double trigger

* nit

* Add playwright test

browser_tests/fixtures/components/SettingDialog.ts

@@ -0,0 +1,34 @@
+import { Page } from '@playwright/test'
+
+export class SettingDialog {
+  constructor(public readonly page: Page) {}
+
+  async open() {
+    const button = this.page.locator('button.comfy-settings-btn:visible')
+    await button.click()
+    await this.page.waitForSelector('div.settings-container')
+  }
+
+  /**
+   * Set the value of a text setting
+   * @param id - The id of the setting
+   * @param value - The value to set
+   */
+  async setStringSetting(id: string, value: string) {
+    const settingInputDiv = this.page.locator(
+      `div.settings-container div[id="${id}"]`
+    )
+    await settingInputDiv.locator('input').fill(value)
+  }
+
+  /**
+   * Toggle the value of a boolean setting
+   * @param id - The id of the setting
+   */
+  async toggleBooleanSetting(id: string) {
+    const settingInputDiv = this.page.locator(
+      `div.settings-container div[id="${id}"]`
+    )
+    await settingInputDiv.locator('input').click()
+  }
+}