towards alg_d3_delaunay
moving to laptop
removed needsRebuild, isInvalid crap
handle empty nodes
fixed threading issue, fixed empty bbox bug
fixed logwidget bug
added PolyMesh::force_rebuild
rebuild newly-empty meshes
proper iteration
somewhat prettier menus
basic alg_d3_delaunay
added geometry pattern
geometry outline updates edge shading mode
always show grid
removed operator stack