Fix list column add/removal in IE (#1487703)

thomascube

2011-01-19 accdd0c29100d20266b186d986d973248dbb9710

 program/js/app.js

@@ -4845,6 +4845,7 @@
        }
        th.appendChild(tr);
        thead.parentNode.replaceChild(th, thead);
        thead = th;
      }

      for (n=0, len=this.env.coltypes.length; n<len; n++) {