Cleanup.

* Removed superfluous redundant comments.
Cleanup.

* There is no BDiskSystemAddOn::GetInitializationParameterEditor() method,
  and it's therefore never being called.
DriveSetup: Added support for changing partition parameters.

* Does not seem to work yet, though. The intel disk system should support it
  now, but apparently the partition's delegate is not yet fully initialized
  for whatever reason.