broken checkbox layout in /rhn/channels/manage/Sync.do?cid=xxx

Before

![brokenchecbox](https://cloud.githubusercontent.com/assets/15332/4474674/0b6857e8-4963-11e4-853b-1bcf0289e675.png)

After

![checkboxfixed](https://cloud.githubusercontent.com/assets/15332/4474676/0e2c773e-4963-11e4-811e-8247a27298f3.png)