title: How to show GlyphButton in FMX ListView
body: <p>On Delphi 10.4.2. This is a very simple question.
  A new multi-device project, Add Listview onto the form. Toggle to design mode, use DynamicAppearance.
  Add 2 text items and 1 glyphButton (Checkbox),Hook up a datasource.</p>
  <p>At design time, no checkbox showing although Glyphbotton.visible is true. At run-time, coded a ListView1ItemClick even with single line code</p>
  <p><code>AItem.Objects.GlyphButton.Visible:=true;</code></p>
  <p>When click an item, it produces error as show in photo.
  <a href="https://i.stack.imgur.com/cXtEf.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>Any idea how to show the checkbox when user clicks an item. It should be a very simple function, why cannot even google an answer for this?</p>
  <p>The sample code is on github <a href="https://github.com/tanghzuk/ListView-Test" rel="nofollow noreferrer">https://github.com/tanghzuk/ListView-Test</a></p>