Unfortunately no. But you could move your custom controls from the database into a plug-in. Then they wouldn't pollute the CC section of a database, be re-usable across databases and might even load slightly faster.
Pro Tip: do not only categorize your controls, but also change the individual name spaces (default is xc), so when looking at the source code you can distinguish them instantly.
Only catch: some work required to move them to an update site.