Hides .info when infoText is set to false

It avoids the margin that this element introduces between the 'select labels' and the 'select widgets' when the info text must not be shown

*Screenshot of the widget before the change*

![without_patch](https://cloud.githubusercontent.com/assets/932124/5142247/7befc1e6-7180-11e4-93fe-e8142679a0c5.png)

*Screenshot of the widget after the change*

![after_patch](https://cloud.githubusercontent.com/assets/932124/5142258/aa427e76-7180-11e4-85d4-6335fea2317d.png)