svn:ignore trees

I set the svn:ignore property on a directory and it nicely changes the named subdirectory (e.g., "build") from red to gray in the Project window and removes it from the Changes window's Unversioned Files list. However, its subdirectories (e.g., WEB-INF) and files remain red and listed as unversioned files. Can I get IDEA to ignore the whole subtree? Otherwise it obscures new files that I may have forgotten to add to svn.

7.0M1b