Updated demo to show #329 changes

Helder Carvalho · Helder Carvalho · commit f18301def1a6 · 2016-05-26T15:57:18.000+02:00
diff --git a/MainDemo.Wpf/Buttons.xaml b/MainDemo.Wpf/Buttons.xaml
@@ -146,7 +146,7 @@
                     </materialDesign:PopupBox.ToggleCheckedContent>
                     <StackPanel>
                         <Button ToolTip="One">1</Button>
-                        <Button ToolTip="Two">2</Button>
+                        <Button ToolTip="Two" IsEnabled="False">2</Button>
                         <Button ToolTip="Three">3</Button>
                     </StackPanel>
                 </materialDesign:PopupBox>
