gfxboot-theme-ubuntu

[Daniel Nylander]

In the module "gfxboot-theme-ubuntu" there are some strings regarding
the word "disk".

According to me (and others), disk = hard drive, disc = (compact) disc.

There are numerous strings who are a bit confusing.

"Insert boot disk %u." . What? Insert my boot hard drive?
"This is not a suitable boot disk."
"Disk Device (scan all disks if empty)" . What? Floppy device?

etc..

Regards,
Daniel