title: DockPanel Suite - DockContent visibility
body: <p>A form contains a DockPanel with an instance of DockContent which has DockState=DockState.DockBottomAutoHide and it acts as a logger view - like Visual Studio's Error list panel. So, when a logging event is added to log list, DockPanel - if is not visible - is shown in next way:</p>
  
  <pre><code>{
    loggerList.AddLogEvent(event);
    loggerContentPanel.Show();
  };
  </code></pre>
  
  <p>but if loggerContentPanel is already visible for user, Show method make the panel to "blink".
  Is any way to get the state of a DockContent with DockState = DockState.DockBottomAutoHide if is visible for user? IsHidden or Visible properties doesn't help too much.</p>