title: What is Repeater.itemsLayout property for? How and in what cases to use it?
body: <p>This works as expected (without <code>&lt;Repeater.itemsLayout&gt;</code> and wrapped by <code>&lt;StackLayout&gt;</code>):</p>
  
  <pre><code>&lt;GridLayout columns="auto, *" rows="auto"&gt;
      &lt;Label text="Some Text" row="0" col="0" backgroundColor="orange"/&gt;
      &lt;StackLayout row="0" col="1" backgroundColor="green"&gt;
          &lt;Repeater items="{{ items }}"&gt;
              &lt;Repeater.itemTemplate&gt;
                  &lt;Label text="{{ $value }}"/&gt;
              &lt;/Repeater.itemTemplate&gt;
          &lt;/Repeater&gt;
      &lt;/StackLayout&gt;
  &lt;/GridLayout&gt;
  </code></pre>
  
  <p>And this as NOT expected (with <code>&lt;Repeater.itemsLayout&gt;</code> and without wrapping by <code>&lt;StackLayout&gt;</code>):</p>
  
  <pre><code>&lt;GridLayout columns="auto, *" rows="auto"&gt;
      &lt;Label text="Some Text" row="0" col="0" backgroundColor="orange"/&gt;
          &lt;Repeater items="{{ items }}"&gt;
              &lt;Repeater.itemsLayout&gt;
                  &lt;StackLayout row="0" col="1" backgroundColor="green"/&gt;
              &lt;/Repeater.itemsLayout&gt;
              &lt;Repeater.itemTemplate&gt;
                  &lt;Label text="{{ $value }}"/&gt;
              &lt;/Repeater.itemTemplate&gt;
          &lt;/Repeater&gt;
  &lt;/GridLayout&gt;
  </code></pre>