LayersPerWedge: resolve ambiguity A-side, C-side
move 'P else C' its own calculable, PivotOrConfirm
move 'A else C' to its own calculable, Side
clarify description
define WedgesWith3ActiveLayers, WedgesWith4ActiveLayers
bugfix WedgesWithNActiveLayers
debug trigger logic
re-factor BasicWedgeTrigger in Any3LayersWedgeTrigger, Any4LayersWedgeTrigger
drop old BasicWedgeTrigger
debug Any3(4)LayersWedgeTrigger