title: Excel-like enter and tab key navigation in cell editing
body: <p>one question for all advanced in jqgrid.</p>
  
  <p>i have to code this usecase:</p>
  
  <p>In jqGrid there are two editable columns. I have to use cell editing.
  User click to one editable cell and when he presses '<em>Enter</em>' key, i select next editable cell UNDER actual one. </p>
  
  <p>Otherwise, when he hits '<em>tab</em>' key, i select next editable cell </p>
  
  <ul>
  <li>if actual cell is last, i set the
  nearest editable cell in the next
  line or  </li>
  <li>if not, i select next
  editable cell in the actual row.</li>
  </ul>
  
  <p>to sum up – i need exact behaviour like in excel.</p>
  
  <p>if i had better reputation, I could have uploaded an image to demonstrate desired situation.
  <img src="https://i.stack.imgur.com/OwrDX.jpg" alt="alt text"></p>
  
  <p>thanks a lot.</p>