Fix issue #198 : Filters dialog - allow searching for CLSID in other C+++ GUID formats including C++ operators, whitespace and 0x prefixes.
Minor performance tweak to CLSIDToString


git-svn-id: http://graph-studio-next.googlecode.com/svn/trunk@306 c2f33eb2-41b2-391d-4cb4-d9d0608729ba