Split calls column in profiler panel

I split calls column in profiler panel into two different columns, because tablesorter don't work correctly for this column. It seems that tablesorter recognize the format "number/number" as MONTH/YEAR or DAY/MONTH and don't work with large values:
![screenshot from 2013-11-28 17 59 15](https://f.cloud.github.com/assets/276041/1640948/63bb6fc0-5846-11e3-9a51-a5d3dc8d0a6f.png)