new_contents: # MenuTitle: Copy to Background, Decompose, Remove Overlaps, Correct Path Direction
  for layer in Glyphs.font.selectedLayers:
      g = layer.parent
      for l in g.layers:
          l.background = l.copy()
          l.decomposeComponents()
          l.removeOverlap()
          l.correctPathDirection()
  
subject: Add "Glyphs/Copy to Background, Decompose, Remove Overlaps, Correct Path Direction"