Ctools modal focus problem in IE8

I've found this problem when dealing with ctools modals and Internet Explorer 8, it's throwing this error:

"Can't move focus to the control because it is invisible, not enabled, or of a type that does not accept the focus."

in this line:

if ( $('#modalContent')) $('#modalContent').get(0).focus();

Looking around, it seems is a "well known" thing from Internet Explorer and there are some workarounds

I'm putting here the fix implemented, but not sure it's the best thing to do, replacing the line above by

      if ( $('#modalContent')) {
        setTimeout(function() {
          $('#modalContent').get(0).focus();
        }, 10);
      }

If it's ok to add a 10ms wait so that lazy IE can catch up, I'll post a patch with it.