So, I am currently making a top-down RPG, and I was wondering how to create a tabbed inventory system. By this I am meaning an inventory room, in which there is the master inventory, with the hot-bar at the top of the screen, and then below the 'quick access' inventory, with tabs for potions (with a sub tab for healing, magic, and misc. potions), weapons (with sub tabs for swords, ranged, and area of effect damage weapons), armor (with sub tabs for head, foot, body, gloves, legs, and arms), keys, etc. The tabs would also be customizable by the player. Inside the tabs and sub tabs, the items would be sorted by a selected option, such as name, power, and stats.