Fix to light last pixel in Nutcracker Effects
Some error checking on Nutcracker effects
Elements now redraw when a row is resized.
Fix Nutcracker dropped on a single element crash
Added NodesChanged event to the preview in preparation for the future
Fixups for the alternating effect to support discrete colors, and sane default values when applied to discrete elements. Still needs rendering fixed up (changing to using Pulse and/or SetLevel effects).
Merge remote-tracking branch 'remotes/derekbackus/master'
Discrete color property: added confirmation when closing the color set editor without saving.