Fix login workflow when asked for permissions

[Neil Shevlin]

The workflow for creating an account is faulty. This occurs directly after you 'create account' on the main page when launching the app. The issue is regarding the request for screen permissions on Mac.

1. Create new account
2. Be presented with username and passphrases
3. Click continue
4. Permissions are asked to watch screen
5. Click accept and update permissions to watch screen
6. The granting of permissions required a restart of the app. The Relaunch of the app removed progress through the app.
7. Retry on main page with either the previously recorded values or create new account

As this is immediately drawn attention to it will cause the app to re-launch. Consider asking for permission on launch for example.