Oversampled fonts produce a large number of font atlases

When oversampling is used for a font, the game will spread the font out over many font atlases. This is because the game hardcodes a size of 256x256 for each font atlas (FontTexture.SIZE), which may not be sufficient for oversampled fonts. In the attached resource pack, just loading into a world, pressing F3+Q, followed by F3+S produces nine font atlases.