CCM-10893: wait for page load in tests

Author: harrim91

tests/test-team/pages/email/template-mgmt-create-email-page.ts

@@ -1,4 +1,4 @@
-import { Locator, Page } from '@playwright/test';
+import { expect, Locator, Page } from '@playwright/test';
 import { TemplateMgmtMessageFormatting } from '../template-mgmt-message-formatting';
 import { TemplateMgmtBasePageNonDynamic } from '../template-mgmt-base-page-non-dynamic';
 
@@ -54,4 +54,14 @@ export class TemplateMgmtCreateEmailPage extends TemplateMgmtBasePageNonDynamic
   async clickSaveAndPreviewButton() {
     await this.saveAndPreviewButton.click();
   }
+
+  async waitForPageToLoad() {
+    const pageHeader = this.page.getByTestId('page-header');
+    await expect(pageHeader).toBeVisible();
+  }
+
+  async loadPage() {
+    await super.loadPage();
+    await this.waitForPageToLoad();
+  }
 }