Merge @ChapterLabel, @SectionLabel, @SubsectionLabel into @Label ?

[fingolfin]

Why do we need separate commands like @ChapterLabel? Why can't we just use @Label, and it'll apply to the current section?

I just tried that (by accident, I forgot about @SubsectionLabel, and did this:

#! @Chapter Methods for recognition
#! @Section Methods for permutation groups
#! @Subsection Giant
#! @SubsectionLabel Giant
#! bla bla bla bla

Not only did this not set the label, it actually caused the whole subsection to disappear (which I guess is a bug).