title: sorting Dojo EnhancedGrid requires user to click narrow area near edge of header
body: <p>Whenever I create a EnhancedGrid in Dojo, I find that it is difficult to sort. I do not get this problem with an ordinary DataGrid.</p>
  
  <p>Sorting requires me to click inside the column header, but only in a narrow region near the edge of the header. I highlighted this region in green in the below picture. For some headers that are only 1 line high, this region is much smaller and more difficult to click.</p>
  
  <p><img src="https://i.stack.imgur.com/3LGTw.png" alt="column header"></p>
  
  <p>When I click in the blue region instead, my mouse simply turns into the re-size icon, even though I'm not clicking on the edge of the cell. Setting <code>"noresize: true"</code> for each cell prevents this problem, but I don't want to stop the user from resizing columns.</p>
  
  <p>Does anyone know how to make it so the user can click anywhere in the header in order to sort?</p>
  
  <p>Thank you!<br>
  Tristan</p>