title: In xamarin forms, how can I focus a control when its label is tapped?
body: <p>In my page, I display a list of questions, each with a template similar to this:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;Grid Margin="5,5,0,0"&gt;
      &lt;Grid.ColumnDefinitions&gt;
          &lt;ColumnDefinition Width="*" /&gt;
          &lt;ColumnDefinition Width="2*" /&gt;
      &lt;/Grid.ColumnDefinitions&gt;
      &lt;Label Text="{Binding Header}" FontSize="Medium" VerticalTextAlignment="Center" /&gt;
      &lt;Entry Grid.Column="1" Text="{Binding TextValue}" /&gt;
  &lt;/Grid&gt;
  </code></pre>
  
  <p>How can I also focus the entry when the label is tapped?</p>