Signature Editor Size too small

[RockRoller01]

The signature editor should be the exact same size as the size of the signature on the forums, else its quite useless for previewing signatures that are more than just some text or a single image

[nanaya]

There's no such thing as "size of the signature on the forums" though. There's a maximum size but that's about it. Making a width dependent signature may end up with silly looking signature.

Also this looks silly so I think an input from @arflyte is required. Note that the maximum width is still different compared to the forum.