Added steps: scroll to element and check element at the top of page.

[tannguyen04]

Checklist before requesting a review

#251

• I have formatted the subject to include ticket number
  as [#123] Verb in past tense with dot at the end.
• I have added a link to the issue tracker
• I have provided information in Changed section about WHY something was
  done if this was not a normal implementation
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• I have run new and existing relevant tests locally with my changes, and
  they passed
• I have provided screenshots, where applicable

Changed

Screenshots

[tannguyen04]

Before

After

[AlexSkrypnyk]

please revert the tags on scenarios and add the steps to the readme file