title: extjs4 how to automatically set grid column width to max width of contents?
body: <p>If you create a grid with no column width or flex attributes, the columns will default to 100px each.</p>
  
  <p>If you then double click on a header separator, the column to the left auto expands to the size of the largest data item in that column.</p>
  
  <p>Is there any way to configure some columns to automatically have that behavior?</p>