batch deleting in Firefly's generation history using favorites inverse setting

Hi - you should be able to delete all the non-favorites in your generation history as a batch by maybe selecting "favorities" and then having an option to inverse that selection and then "deleting all". Most times I have to generate a lot of images before the AI understands what to produce that I have in my mind. It's very labor intensive to delete them one by one, but they crowd up my screen if I don't.