every time this script was loaded. This was happening
every time we loaded a message. It had a side effect
of causing a uri dispatching crash and it had severe performance implications. We shouldn't be creating
a new msg window every time we display a message.
this may have a bad side effect when we support multiple
3-pane windows because we can no longer call SetWindow.
git-svn-id: svn://10.0.0.236/trunk@54785 18797224-902f-48f8-a5cc-f745e15eee43
1d98ae0543