anchor.diff:  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:
  +    public boolean isClientWindowStoreWindowTreeEnabledOnAjaxRequest()
  +    {
  +        return true;
  +    }
  +    
  +    @Override
  +    public boolean isClientWindowStoreWindowTreeEnabledOnButtonClick()
  +    {
  +        return true;
  +    }
  +}
  +
  +====== Change windowhandler.html
  +
  +To customize the look and feel of the windowhandler.html, you can simply
  +provide a own via:
   
   [source,java]
   -------------------------------------------------------------------
  
positive.code: 
  ===== Configuration
  
  ====== Change windowhandler.html
  
  To customize the look and feel of the windowhandler.html, you can simply
  provide a own 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;
      }
  