Purpose: Helper routine used by thm_fitgmom_overview and thm_fitmom_overviews Makes a blank panel if proper data quantities are not present $LastChangedBy: lphilpott $ $LastChangedDate: 2012-06-14 10:41:59 -0700 (Thu, 14 Jun 2012) $ $LastChangedRevision: 10558 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/themis/common/blank_panel.pro $