(core) Add a waitForServer to fix HomeIntro test that fails for deployments

Test Plan: Tested by running HomeIntro in staging_deployment suite.

Reviewers: georgegevoian

Reviewed By: georgegevoian

Differential Revision: https://phab.getgrist.com/D2956

test/nbrowser/gristUtils.ts

@@ -1103,6 +1103,8 @@ export async function completeCopy(options: {destName?: string, destWorkspace?:
     await driver.findContent('.test-select-menu li', options.destWorkspace).click();
   }
 
+  await waitForServer();
+
   // save the urlId
   const urlId = await getCurrentUrlId();