Buy Names page should support hex names

[JeremyRand]

It would be nice if the Buy Names page allowed entering names as hex, so that users who are storing binary data don't need to use the CLI.

[ghost]

Because you can't pre-register names on the buynamespage, why should hex be allowed in the UI to begin with?
To be honest, I don't believe the buynamespage serves any purpose other than to be visually appealing.

I only use it when I'm too lazy to use the CLI to check availability.

I'm interested to hear what @domob1812 thinks about this.

[JeremyRand]

Thanks for pointing out that UX issue @redarmyfaction , I've filed #521 and #522 . (No idea why those weren't already filed.) Please use those issues for discussing that UX issue; it doesn't have anything to do with hex names.