private void MenuPin_Click(object sender, EventArgs e)
{
var trvm = ((PivotItem)pivot.SelectedItem).DataContext as RedditViewModel;
if (trvm == null || !trvm.IsTemporary)
return;
Messenger.Default.Send<CloseSubredditMessage>(new CloseSubredditMessage { Heading = trvm.Heading });
Messenger.Default.Send<SelectSubredditMessage>(new SelectSubredditMessage { Subreddit = trvm.SelectedSubreddit, AddOnly = false });
}