* Smooth: vert-face map is now only created when this tool is used, would be best to also avoid using it here to avoid a sudden increase in memory, but is not trivial. * Grab: now no longer uses active verts list and loops over nodes like other tools. * Layer: uses original coordinates from undo now to save memory when not using persistent layer. * Anchored: this option works again now, though is still quite slow as it loops over all verts/faces. Smooth, layer tools and the anchored option could still be improved to use less memory and/or work faster by only doing things per node.