Wrong order of NewTabHost initialization

[danielklecha]

Hi!

Great project :)
I use ReactiveUI and in that project bindings happen after view is activated.
Because of that ItemsSource is not set when drag tab and drop in right corner.
I think that Layout.cs must be updated to handle that.
Lines 976-979 should be reordered:

newTabHost.Container.Show();
newTabHost.Container.Activate();
newTabHost.TabablzControl.AddToSource(content);
newTabHost.TabablzControl.SelectedItem = content;