Slightly reworked how the tooltips themselves are rendered
Added the ability to fully customize the tooltip
Each ((UPPER/LOWER)_(BACKGROUND/OUTLINE)_COLOR) option is an 8-digit HEX value. This means that the first 2 characters after 0x are responsible for transparency, and the remaining 6 are responsible for color
For example, 0xFFAB12CD is the color AB12CD with transparency FF (255)
If GTNHLib is installed and CHANGE_GUI_TOOLTIP == true, then all config changes will also apply to tooltips in GUIs