max_float_safe

Used as a default maximum in various places:

• Options.max_size_content
• Font.textSizeEx max_width

This is a compromise between desires:

• gives a decent range
• is a normal number (not nan/inf) that works in normal math
• can still have some extra added to it (like padding)
• float precision in this range (0.125) is small enough so integer stuff still works

If positions/sizes are getting into this range, then likely something is going wrong.