Bundled new features besid the Lab tool enhancement (by jdesmis) :
- curve to control skin tones in vibrance tool, credits: jdesmis
- right click over SHCSelector (below the parametric curve) to reset to default values, credits: Hombre
- colored bars around curves, credits: Hombre
(sorry for this mess:) I committed previous revision without first accepting an incoming changeset and that was creating new head, so I had to reverse my commit)