Preferred serving size measurement

When I select a new food item, it has a default serving size for it (seemingly randomly cups, oz's, etc). When I pick one, it seems to remember it.

But I'd like to be able to set a preferred serving size of grams, so it defaults to that on every new food. That's how I measure almost everything I eat, and would shave just a bit of time off every data entry.

Thanks, and keep up the awesome work.