Add capability to create User Defined Views based on message contents
Update User Defined View to be able to create a UDV by message contents.
A work around for this right now is to go to the Advanced Search and bookmark all the results. Then use the Bookmarks view as a way of seeing results that you would typically want to show up in a UDV.
You should be able to create a new view based upon message contents (either match contents or 'Invert', meaning match everything including, or not including, the message content