If you want the large icon version of this, set: mailnews.attachments.display.largeView to true.
Remove the flex on the message pane. This keeps us from properly remembering the height of the message pane in the various
3-pane configurations now that we generate the 3-pane dynamically.
Remove localstore.rdf information for the alternate 3-pane view xul file which we no longer use.
git-svn-id: svn://10.0.0.236/trunk@145122 18797224-902f-48f8-a5cc-f745e15eee43
