Use a separate command for writing flash

[andrewcharnley]

Having a multi coloured display is a real bonus, I can use it to indicate errors and the like.

But if I flash/change colours a few times that's a couple writes to EPROM, and the 100,000 count will eventually be used up. It also slows the whole system down by locking the CPU while it writes.

Solution is to remove the auto-save and map it to a character in the 0x0 to 0x20 region, or add it to the command options.