edm on later linux distros

[John Sinclair <sinclairjw@ornl.gov>]

Some time ago, I intentionally violated a supposed requirement to have 
only one top level shell per display in a application. At that time, 
anecdotal evidence from various sources seemed to indicate that the 
requirement was not actually enforced and things seemed to behave more 
uniformly when the requirement was violated. Apparently, this is now a 
real requirement and honoring it seems to have a significant effect on 
the stability of edm on X components associated with fedora 6 and beyond.

A new edm version is available at 
http://ics-web4.sns.ornl.gov/edm/info/show.php?mon=Jun&theDay=30&year=2008

All feedback related to these changes is greatly appreciated.