title: Angular material - autocomplete component dropdown section does not stick to the input field
body: <p>The autocomplete component from angular-material is not working as expected inside the MatDialog component. The drpodown section from autocomplete component does not stick to the input field.</p>
  
  <p>stackblitz link - <a href="https://stackblitz.com/edit/angular-s698hp" rel="nofollow noreferrer">example</a></p>
  
  <p>to reproduce - Goto above stackblitz. Click on "open popup" button. Click on the "Pick One" autocomplete field. The options will open as dropdown. Then scroll the bodu of popup. Notice the dropdown section of autocomplete component does not stick to the input field. How do I fix this?</p>