(core) Wrong userId in the team-success endpoint when multiple accounts are logged in

Summary:
In browser where user is logged in multiple times, she can start
creating a new site from docs org where user B is the default one, and end up on the
api endpoint where user A is the default one. This resulted in wrong userId in the handler.

Test Plan: New test

Reviewers: georgegevoian

Reviewed By: georgegevoian

Differential Revision: https://phab.getgrist.com/D4029

test/nbrowser/gristUtils.ts

@@ -948,6 +948,9 @@ export async function waitForLabelInput(): Promise<void> {
  * Sends UserActions using client api from the browser.
  */
 export async function sendActions(actions: UserAction[]) {
+  await driver.manage().setTimeouts({
+    script: 1000 * 2, /* 2 seconds, default is 0.5s */
+  });
   const result = await driver.executeAsyncScript(`
     const done = arguments[arguments.length - 1];
     const prom = gristDocPageModel.gristDoc.get().docModel.docData.sendActions(${JSON.stringify(actions)});