Rebindable Quickslots

During my time with GMS and EMS I became quite dependant on the customization of the quickslots in the bottom right of the screen.

Therefor i request putting in an option to customize it. Especialy when im playing on a potion heavy class like Magicain, i would love to have easy access to the infromation of how many potions i have left. Ofcourse i could just assign the potions to the specified quickslots, but for my keyboard setup pressing those buttons is far from optimal.
This image is an example of a setup i use in GMS.

I do not know how much effort it takes to implement it, or if its going to be implemented at all, but I'll post it either way.