Added WrapPanel example to TestApplication

samples/XamlTestApplicationPcl/Views/MainWindow.paml

@@ -174,6 +174,21 @@
                           <Rectangle Fill="#FFC107" Height="50" />
                       </StackPanel>
 
+                    <TextBlock Text="WrapPanel" FontWeight="Medium" FontSize="20" Foreground="#212121" />
+                    <TextBlock Text="Wraps children to new lines if no space is left:"
+                              FontSize="13"
+                              Foreground="#727272"
+                              Margin="0, 0, 0, 10" />
+                    <WrapPanel>
+                      <Rectangle Fill="#FFC107" Height="50" Width="100" Margin="2.5"  />
+                      <Rectangle Fill="#FFC107" Height="100" Width="100" Margin="2.5"  />
+                      <Rectangle Fill="#FFC107" Height="50" Width="100" Margin="2.5"  />
+                      <Rectangle Fill="#FFC107" Height="50" Width="200" Margin="2.5"  />
+                      <Rectangle Fill="#FFC107" Height="100" Width="50" Margin="2.5"  />
+                      <Rectangle Fill="#FFC107" Height="50" Width="100" Margin="2.5"  />
+                      <Rectangle Fill="#FFC107" Height="50" Width="100" Margin="2.5"  />
+                    </WrapPanel>
+
                       <TextBlock Text="Canvas" FontWeight="Medium" FontSize="20" Foreground="#212121" />
                       <TextBlock Text="A panel which lays out its children by explicit coordinates."
                                   FontSize="13"