Feature Request: Duplicating Existing Income/Expense Category

As I was creating a dummy budget I found myself wanting to be able to create a new category inside an existing category group that was a duplicate of an existing one. For example I have 2 kids that both do swimming lessons, and their expenses are roughly the same but a little different. I set up the first child Swimming Lessons category and entered the planned expenses, and then wanted to duplicate it and add some additional planned expense to the new category.