internal static IObservable <Unit> DocumentStyleManager(this ApplicationModulesManager manager)
 => manager.DocumentStyleManagerDetailView(view => view.WhenControlsCreated().FilterReplacementStyles())
 .Merge(manager.DocumentStyleLinkTemplate())
 .Merge(manager.SynchronizeTemplateStyleAttributes())
 .Merge(manager.AcceptChanges())
 .Merge(manager.DeleteStyles())
 .Merge(manager.ApplyStyle())
 .Merge(manager.ReplaceStyles())
 .Merge(manager.Content())
 .Merge(manager.ImportStyles())
 .Merge(manager.LinkTemplate())
 .Merge(manager.SynchronizeScrolling());