[Feature request] Find unused code in whole project

If I go to a class, or an object or method, I can right click and select "Find Usages", and if there are no usages, a popup text shows that there are no usages in the project. I would like to have the ability to find all the things that have no usages in the application, since this would be a good starting point for figuring out what is dead code.  

Cheers!
Josh