MetroAnimatedTabControl style should not ClipToBounds 

`MetroAnimatedTabControl.xaml` style defines the control template `<Grid ClipToBounds="true" ...>`, but the WPF TabControl does not ClipToBounds by default. May you remove it please or bind it:

``` xml
<Grid ClipToBounds="{TemplateBinding ClipToBounds}" ...>
```

Thanks
