Enable URL creation from filebrowser

In order to get the url of an analysis, one has to open the analysis and save it and create the url in the analysis designer. A typical use case for retrieving the URL though is to browse analyses, e.g. in the public, example or shared folder and forward them using the URL. Therefore it would be easier if the URL could be generated in the filebrowser without the need to open and load the analysis.

(from redmine: issue id 1073, created on 2012-07-11 by root, closed on 2013-01-07)