Add Category Headings to dropdown

Please allow a Category Header for expenses within the dropdown to better recognize the subaccounts. Currently, the expense subaccounts just looks like run-on phrases and it is not user friendly to find what you need. It would help having the category header to immediately recognize you're in the right area for that expense. An example of adding an Expense Category Header would be as follows:

6100 OPERATIONS (the Header, not selectable, but visible and subaccounts beneath it)

*6101 Facility Supplies*6102 Tools*6103 etc...