title: Set content page icon
body: <p>I created an hamburguer menu with master detail page. In the detail page i would like to have a botton navigation bar with shortcuts (like twitter app for android) but icons of eash shortcuts are not being displayed.
  I tried using url, file path and ImageSource but none of these displayed the image icon.</p>
  
  <pre><code>&lt;MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms"
               xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
               x:Class="KiaiDay.Views.Main.HomePage"
               xmlns:pages="clr-namespace:KiaiDay.Views.Main"
               xmlns:local="clr-namespace:KiaiDay.MarkupExtensions" NavigationPage.HasNavigationBar="False"&gt;
  
  
    &lt;MasterDetailPage.Master&gt;
  ...
  
    &lt;/MasterDetailPage.Master&gt;
  
  
      &lt;MasterDetailPage.Detail&gt;
          &lt;NavigationPage&gt;
              &lt;x:Arguments&gt;
                  &lt;pages:HomePageDetail /&gt;
              &lt;/x:Arguments&gt;
          &lt;/NavigationPage&gt;
      &lt;/MasterDetailPage.Detail&gt;
  &lt;/MasterDetailPage&gt;
  </code></pre>
  
  <p>Homepagedetail</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt;
  &lt;TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              x:Class="KiaiDay.Views.Main.HomePageDetail"
              Title="Pagina Inicial"
              xmlns:local="clr-namespace:KiaiDay.MarkupExtensions"
              xmlns:android="clr-namespace:Xamarin.Forms.PlatformConfiguration.AndroidSpecific;assembly=Xamarin.Forms.Core"
              xmlns:view ="clr-namespace:KiaiDay.Views.PosLogin"
              BarBackgroundColor="LightGray" BarTextColor="White"
              android:TabbedPage.ToolbarPlacement="Bottom"&gt;
  
      &lt;ContentPage Title="Home" Icon="{local:ImageResource KiaiDay.Images.calendarWhite.png}" NavigationPage.TitleIcon="calendarWhite.png"/&gt;
      &lt;ContentPage Icon="calendarWhite.png"/&gt;
      &lt;ContentPage Icon="https://img.icons8.com/ios/50/000000/calendar-11.png" /&gt;
  &lt;/TabbedPage&gt;
  </code></pre>
  
  <p>I tried Url of the image, using file path located at android project (Resources/drawable) and ImageSource. None of these were able to display the icon.</p>