title: Xamarin forms scroll to top of listView which is inside a tabbed page by tapping Tabbed Page Top Bar
body: <p><strong>Current Situation</strong></p>
  
  <p>I have made a xamarin forms cross-platform app which has a tabbed Page with an infinite scroll listView.
  The listView is populated in increments of 10 items whenever the last item appears.</p>
  
  <p><strong>The normal behaviour</strong></p>
  
  <p>Usually when we tap the top bar of the tabbed page (the bar containing the tabbed page's Title) for the first time (if we are not viewing the tab at that moment), the app will switch to view that page. Which is fine.</p>
  
  <p>When we tap the top bar for the second time (when tapping the top bar of current viewing tabbed page), nothing happens (unlike twitter, u can tap to scroll to the top )</p>
  
  <p><strong>My Problem</strong></p>
  
  <p>I want to be able to make the listView to scroll back to the top (to the first Item on the list) when the top bar is tapped (something like how twitter does in its android app) while still maintaining all the already loaded items in my listView.</p>
  
  <p>Any idea on how to make that top bar react to the tap to scroll the listView back to the top?</p>