Move clearfix so links are within the defining id div

A clearfix had been added here to try and fix a formatting issue I introduced at an earlier time.  When this was done it left the 'like' and 'delete' links on the comment outside of the defining id for that comment.  The request specs could not find them within this id and were failing.  I believe the ajax 'like' functionality was not working because of this. 

I have removed the class comment-anchor(it didn't seem to be doing anything useful?) and put the comment id on a clearfix that surounds the links.