In editlab, modified to update history in the labels and show appropriate...

In editlab, modified to update history in the labels and show appropriate files in the dialog box for choosing FROM parameter filenames. Fixes #655. Fixes #1084

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4927 41f8697f-d340-4b68-9986-7bafba869bb8