Spend hit dice outside of resting

It would be really nice if DDB kept track of hit dice spent outside of resting. For example, the Dwarven Fortitude feature allows spending hit dice when you take the dodge action, but there is no way to spend hit dice without taking a short rest. This means to use this feature, you have to take a short rest and then use any features that were spent prior to the rest that have been restored. Having hit dice independant of short rests also allows for houserule resting, such as spending 15 minutes resting allows using hit dice but nothing else, like warlock spell slots, is restored. It also allows for homebrew features that use hit dice acting as charges.