updates.
* Optimized retrieving the font list from the server.
* This greatly simplifies the app_server communication for getting the font
list as well - there are now only 2 commands instead of 6.
* Moved extra font flags creation from ServerApp to FontStyle::Flags().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14751 a95241bf-73f2-0310-859d-f6bbb57e9c96