anchor.diff:  
   ===== Configuration
   
  -====== Change windowhandler.html
  -
  -To customize the look and feel of the windowhandler.html, you can simply
  -provide a own via:
  +====== Reduce windowhandler.html flickering
  +
  +Per default we only overwrite the onclick events of all links on the current page to make a 'screenshot' between requests.
  +We also provide a mechanism to store the 'screenshot' on ajax requests (e.g. Post-Redirect-Get via p:remoteCommand or other components) or on every button onclick:
   
   [source,java]
   -------------------------------------------------------------------
  
positive.code: public class MyClientWindowConfig extends DefaultClientWindowConfig
  {
      @Override
      public String getClientWindowHtml()
      {
          return "<html><body>Loading...</body></html>";
      }
  }
  -------------------------------------------------------------------
  
  If you didn't copy the JS logic from our default windowhandler.html or
  if you would like to always show your custom html instead the 'screenshot', you should disable logic via:
  
  [source,java]
  -------------------------------------------------------------------
  
negative.code: public class MyClientWindowConfig extends DefaultClientWindowConfig
  {
      @Override
      public String getClientWindowHtml()
      {
          return "<html><body>Loading...</body></html>";
      }
  }
  -------------------------------------------------------------------
  
  If you didn't copy the JS logic from our default windowhandler.html or
  if you would like to always show your custom html instead the 'screenshot', you should disable logic via:
  
  [source,java]
  -------------------------------------------------------------------
  @Specializes
  public class MyClientWindowConfig extends DefaultClientWindowConfig
  {
      @Override
      public boolean isClientWindowStoreWindowTreeEnabledOnLinkClick()
      {
          return false;
      }
      
      @Override
      public boolean isClientWindowStoreWindowTreeEnabledOnAjaxRequest()
      {
          return false;
      }
      
      @Override
      public boolean isClientWindowStoreWindowTreeEnabledOnButtonClick()
      {
          return false;
      }
  