Increase JOY_NUM_BUTTONS to 128 and add required localizations

[derrickturk]

I want to put this out as less of a "pull request" and more of a strawman or question from a drive-by contributor - is this worth doing? Are there non-obvious downsides (performance? backward compatibility with old pilot profiles [maybe the movement of the hat switch identifiers has bad implications]? etc.).

Bumping the joystick button limit to match what I understand to be the maximum allowed by DirectInput (plus the now excellent multiple-controller support) would be a big help for those of us with "fancy" HOTAS setups. Many mid- and high-end controllers support acting as multiple "virtual controllers", but for at least some this doesn't work with FS2Open due to each "virtual controller" having the same identifiers.