title: ExtJS 4 > Grid Editor > Editor with "datefield" xtype doesn't fill properly
body: <p>When I double-click a record for editing, it doesn't fill the date picker (i.e. the date picker shows blank, even though the record has the value).</p>
  
  <p><img src="https://i.stack.imgur.com/3voS9.png" alt="enter image description here"></p>
  
  <p>I have searched a lot, but didn't get any fix.</p>
  
  <p>Anyone has any idea...?</p>