Cannot edit description of custom class / Cannot Delete custom classes

When you create a new class in the Class list, you're able to add a description of that class. But there's no way to go back in and edit the class name or description.

I thought maybe a workaround would be to delete the class and recreate it, but you can't even delete the class. You can add a second class of the same name, which is a bit odd, I think. It should probably ask if you want to overwrite the class of the same name. and if you choose no, it should append a number after it so you can at least know which is the second one.