When creating ground point, and no images intersect, print error. Also,...

When creating ground point, and no images intersect, print error.  Also, filter images that intersect and highlighted to the top of the list. Fixes #326

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@3243 41f8697f-d340-4b68-9986-7bafba869bb8