Fixed issue with not allowing a linked parameter to keep the same name when editing.

git-svn-id: http://beast-mcmc.googlecode.com/svn@6529 ca793f91-a31e-0410-b540-2769d408b6a1
Robust counting was doubling up the prefixes for the treeLikelihood and elsewhere.

git-svn-id: http://beast-mcmc.googlecode.com/svn@6530 ca793f91-a31e-0410-b540-2769d408b6a1