(core) port some more test/browser tests to newer selenium

Summary:
Ports more test/browser tests from *.test.js (run using an old selenium setup) to *.ntest.js (run using newer setup).

Weird test failures happened due to a change in timing. Eventually tracked in down to billing changes in one test suite resulting in reloads in another test suite, since it turns out redis pub/sub channels are not scoped to the redis database specified in REDIS_URL, but are global:
  https://redis.io/docs/manual/pubsub/#database--scoping.

Test Plan: Ported tests should run and pass

Reviewers: jarek

Reviewed By: jarek

Differential Revision: https://phab.getgrist.com/D3844

app/server/lib/Sharing.ts

@@ -480,6 +480,7 @@ export class Sharing {
       } catch(rollbackExc) {
         this._log.error(docSession, "Failed to apply undo of rejected action", rollbackExc.message);
         await accessControl.finishedBundle();
+        this._log.debug(docSession, "Sharing._applyActionsToDataEngine starting ActiveDoc.shutdown");
         await this._activeDoc.shutdown();
         throw rollbackExc;
       }