Make signatures smaller + scrollable

On old forums, signatures were in a smaller window but you could scroll through them for each person's signature if they exceeded the vertical limit of the window. This was ideal for those of us with super long signatures, without limiting player customization with shorter signature character limits.

With this change, the signature character limit could also be drastically raised! Even more of a reason to do it in my opinion.

Done!

Awesome! Thanks cool :)