title: Keep report header visible while scrolling
body: <p>I often check the following option in the hope that it will be implemented when the report is rendered on the <code>RS</code> web portal - but it never works...</p>
  
  <p><img src="https://i.stack.imgur.com/Co0OL.png" alt="enter image description here"></p>
  
  <p>The reports usually have some <code>Row Groups</code> - does this have an impact on whether this option will work?</p>
  
  <p>Or is this a bug in <code>Reporting Services</code>?</p>