How to hide .svn directories?

Hello,

I have a project under subversion version control. Therefore the source
directory contains .svn directory.

Under linux the project tab shows the content of those directory (I have
checked the "use sub-directory option").

I have seen that there is an option to hide directory patterns in
project. Apparently the pattern hides CVS files. How can I extend it to
hide .svn directories?

Thanks in advance,
Mathieu