Improve manual testing check

[TurekBot]

We discussed improving the check a bit in #28.

Previously, myself and other users found that it was difficult to know what we had done wrong.

Intent

I hope that these changes

• make it easier for people to know what they're missing
• make the check specific to general actions and less specific to
  • ordering of words
  • specific words
  • combination or separation of steps

Test Cases

I've checked it against the following sets of manual steps:

Open the app by going to localhost:7272
Fill in the username
Fill in the password
Click the login button
Check you're on the Welcome page

Open the browser to http://localhost:7272
Put in the username and password
Log in and check that you're on the Welcome page

Open browser to localhost:7272
Enter "demo" in username field
Enter "mode" in password field
Click the login button
Check that you're taken to the welcome page
Check that you can log out
Try entering bad credentials
Ensure that when you do, you see an error page

Open browser
Navigate to localhost:7272
Enter username
Enter password
Submit login form
Check that welcome page text is visible

Any feedback is welcome!