grid multi select checkboxmodel issue

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   grid multi select checkboxmodel issue

   
   

   
   

   grid multi select checkboxmodel issue

   
   
   
   

   
   

   I'm using the checkboxmodel and a locked grid. The Select All checkbox I get at the top appears but doesn't work. If I remove the locking it seems to work.
   

   See this fiddle. http://ift.tt/1wWjRRY

   
   

   
   

   
   

   
   

   
   

   
   
   
   

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grid multi select checkboxmodel issue