title: ExtJS 4.x: How to disable "dirty record" red corner in Ext.grid.Panel cells?
body: <p>I have an Ext.grid.Panel (aka gridpanel) with a store, used only for client-side visual effects (i.e., nothing gets saved to the server). When I create new model instances and add them to the store they are shown in the grid with a red corner (presumably indicating that store changes haven't been saved).</p>
  
  <p>At the moment I'm calling the .commit() method on each record/model before it is added to the store to prevent the dirty record red corner in the grid. </p>
  
  <p><strong>Is there a more generic way of simply configuring a grid panel to not display any visual indicators regarding the "dirty" status of a record?</strong></p>
  
  <p><em>Note: The solutions in <a href="https://stackoverflow.com/questions/3083631/how-to-disable-the-red-mark-indicating-a-dirty-record-in-extjs-editorgridpanel">this similar question</a> either involve CSS or only work for ExtJS 3. I'm hoping to find a programmatic "setting" that works for ExtJS 4.</em></p>