title: How can I get the current row in a grid with a combobox editor
body: <p>I have an EditorGridPanel with a ComboBox in one of the columns.<br>
  Within a 'select' event listener for that ComboBox, I'd like to know which grid row (not ComboBox row) it is on.<br>
  The reason is that I'd like to update a different column in the grid every time an item is selected.<br>
  I think I'm likely missing something obvious.</p>
  
  <p>Thanks for any help.</p>