Client side items in bottom inventory

[underscore95]

Is your feature request related to a problem? Please describe.

I want to be able to set items in the bottom inventory so that my GUI can take up the whole screen.

Describe the solution you'd like

Add an optional boolean to methods like setClickable, setDisplay which determines if the item should be placed in the top or bottom inventory.

Example usage:

destination.getSlots().getTopSlots().forEach(slot -> menuContents.setDisplay(slot, icon, true));
destination.getSlots().getBottomSlots().forEach(slot -> menuContents.setDisplay(slot, icon, false));

Describe alternatives you've considered

There isn't really any alternatives (that I can think of)

Additional context

None