title: How to center the "Loading data . ." message in the visible screen in jqgrid treegrid?
body: <p>I have a jqGrid treegrid with about 40 columns so there is a large horizontal scroll bar (depending on the size of the browser).  The issue is since the width is so large, when the page loads or i do a filter, etc, you don't see the popup "Loading message . ." because its off to the right of the screen.  </p>
  
  <p>Is there any way to have the "Loading Data. ." message center in the current visible screen (instead of the page as a whole?</p>