1 budget for multiple categories

For me, this would be a great addition but not sure how feasible it is. I would like to be able to set up 1 budget target for multiple categories. To be precise it’s the entertainment, eating out and shopping that I’m looking after.

The way i conceptualise it I can sometimes spend more on going out but then I have to spend less on shopping, to me this is just one pot of money that I can choose to spend between these 3 categories, however the current system does not make it that easy to see if I’m overspending across these budges and also it doesn’t make sense to set a budget individually for shopping (in my case) because that can fluctuate from a month where I don’t spend anything on shopping to a month where I spend quite a bit.