Done: HxD: Custom CRC storage

[Bryan]

I would like to store the Custom CRC settings from one session to another.

Even better would be the ability to add my own Custom CRC's to the list of available CRC's.

Thanks,
Bryan

[Maël]

Will implement it after the 1.7.x stable is out.

[Maël]

Persisting Custom CRC settings across sessions is available since HxD 2.1.