Well you can put the projects in a folder or multiple folders depending on how you want to set up your library.
How do you now have your projects setup? What do they represent for you? For me I have one project for each days shooting and then each project is in a month folder and all the month folders for the year are in a year folder. So I can expand and collapse what I see.
Others setup their projects differently, say a project for a client or for a particular job.
If you have a long list of projects you need to rethink how you have the library setup.
regards