In qview, the red boxes that indicate the current selection (i.e. the rubber...

In qview, the red boxes that indicate the current selection (i.e. the rubber band) shown while creating plots, updating stretches, and other actions should now only draw on cubes (viewports) that are relevant to the action being performed. Fixes #1035.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4998 41f8697f-d340-4b68-9986-7bafba869bb8