Minor css bug fix

http://sunflower.sahanafoundation.org/eden/project/task/336
At the very least, yes. 

But in general, everything that interferes that gravely with the formstyle should be removed from widget.css.

This particular rule breaks responsiveness of formstyles, and thus must be overridden - and that does actually apply for the SSF theme as well. Responsive themes (=all bootstrap/foundation-based themes) should not impose a fixed width to form widgets, that simply doesn't make any sense whatsoever.

Hence - it should be *fixed* properly rather than moved.