title: Update display of one item in a ListView's ObservableCollection
body: <p>I have a ListView which is bound to an ObservableCollection.</p>
  
  <p>Is there a way to update a single cell whenever a property of a SomeModel item changed, without reloading the ListView by changing the ObservableCollection?</p>
  
  <p>(Question is copied from <a href="https://forums.xamarin.com/discussion/40084/update-item-properties-in-a-listviews-observablecollection" rel="nofollow noreferrer">https://forums.xamarin.com/discussion/40084/update-item-properties-in-a-listviews-observablecollection</a>, as is my answer there.)</p>