Rawset some more variables related to battle and hud code

Setting as draft until I am confident I have found every potential problem point with mods making use of the globalized battle and hud code. This is a collection of quick fixes for issues that arise when mods attempt to redefine parts of battle or HUD code, with the goal of making the game more stable in these situations and minimizing the amount of situations where code that isn't edited but needs to be present alongside the changes has to be added.