Modified updateRecentProjects to display a chronologically ordered list of the...

Modified updateRecentProjects to display a chronologically ordered list of the most recently loaded projects. Fixes #5216.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/branches/ipce@8337 41f8697f-d340-4b68-9986-7bafba869bb8