That bug was uncovered by Henri's change of the bitfield sizes.

It makes the code more readable and will help us to merge the ALPHAOP
and COLOROP code.

Fix the unnecessary SUBLANG_NATURAL.
Change the font size from 8 to 9.

This moves setting baseShader.hex_version and baseShader.functionLength to
shader_get_registers_used(), where it's more appropriate.

The find_builtin_prop internal routine in dispex.c implements a binary
search with the requirement that a class properties array be in
ascending order, so this fix allows String's properties array to
satisfy this requirement and allows the tests for String.sub() to
pass.