html characters are escaped in check-out tooltip

http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=34057
Before:


![screen shot 2014-08-11 at 11 01 18_before](https://cloud.githubusercontent.com/assets/869724/3873782/74b94c7e-2137-11e4-93eb-51e10940e84c.png)

After


![screen shot 2014-08-11 at 11 00 30_after](https://cloud.githubusercontent.com/assets/869724/3873789/7f391de6-2137-11e4-8f44-75dfdfafbda1.png)