What:
A dedicated key to open the potion switching interface.

Why:
The functionality this mods adds to tools should be added in full to potions.

Current scenario for tools: Player uses a tool X, tool x looses some durability. The player then opens the item switcher on the tool palette and switches to tool Y.
Problem scenario for potions: Player uses potion x, player is left with either a glass bottle or nothing in their hand, player is unable to open the item switcher on the potion palette without opening their inventory.

Impacts on Gameplay:
Players are able to swap to potions stored in their inventory or shulker boxes at any time.
Players are able to more effectively use splash potions during combat

Alternate Solutions:
The issue described could be also be fixed for non-splash potions by adding glass bottle to the potion palette
The issue could be fixed for splash potions if item switching on an empty inventory space that recently contained a splash potion

Semi-Duplicate of #11