Magic wand (flood fill style) masking functionality
Need to implement a magic wand (flood fill) style mask tool, as per other photography applications.
Why? Need comes from a very normal edit requirement: Sky. Flat. Want to alter (eg. brighten). Don't want to waste half a day drawing a neat mask. The sky shares tones with neighbouring objects, so it is not possible to get a neat result out of the combination of drawn + parametric masks... the magic wand tool is missing!