title: Extjs : Grid column width in percentage
body: <p>Looks I am not the only one who has run into this situation. </p>
  
  <p>I need to set the widths of the columns in a <code>gridpanel</code> in percentages so that on any size (due to resizing) each column has the predefined percentage width. I am not able to achieve this by setting <code>width : 'XY%'</code> on each column. </p>
  
  <p>Also noticed that the same question is being asked on sencha forums <a href="http://www.sencha.com/forum/showthread.php?138485" rel="nofollow noreferrer">1</a> and <a href="http://www.sencha.com/forum/showthread.php?92930" rel="nofollow noreferrer">2</a>. </p>
  
  <p>This didn't help either : <a href="https://stackoverflow.com/questions/3174966/how-to-set-width-in-ext-grid-columnmodel-in-percentage-terms">How to set width in Ext.grid.ColumnModel in percentage terms?</a></p>
  
  <p>Note : I donot want to flex the columns, but want to set percentages. </p>
  
  <p>Extjs gurus please shed some light!</p>