Added functionality to allow user to double-click the project name on the...

Added functionality to allow user to double-click the project name on the Project tree and change the name.  Fixes #2295.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/branches/ipce_FY17-Sprint1@7576 41f8697f-d340-4b68-9986-7bafba869bb8