Last modified: 2010-05-15 14:36:10 UTC
The watchlist should have a namespace selector box like special:contributions and special:allpages.
*** Bug 2043 has been marked as a duplicate of this bug. ***
Javascript workaround at http://en.wikipedia.org/wiki/Wikipedia:WikiProject_User_scripts/Scripts/Watchfilter
A server-side enhancement is still wanted, though. User scripts are obviously much slower.
The user script also seems to disable the userpopups script (I added the watchfilter script, and didn't get popups. I then reverted to the version prior and popups word again. I've not done any more testing than that though).
While the Javascript option is good, a server-side implementation would be vastly preferrable. Since this already exists in other actions like Special:Contributions, it shouldn't be TOO difficult to include.
Added in SVN HEAD.
SVN r13482 to be exact.