Allow editing in Get Info dialog

[inexorabletash]

• Lock/Unlock with a checkbox
• Change type
• Change auxtype

[inexorabletash]

This unfortunately wouldn't replace Lock or Unlock commands, as those apply to multiple files/folder contents.

[inexorabletash]

On further thought, changing the type/auxtype is a bit niche. Implementing that as a Desk Accessory makes sense.