Disable retract on layer change when doing spiral vase; also check that we're printing a single-material object
Disable retract on layer change when doing spiral vase; also check that we're printing a single-material object

lordofhyphens/Slic3r,prusa3d/Slic3r,curieos/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,alexrj/Slic3r,platsch/Slic3r,pieis2pi/Slic3r,pieis2pi/Slic3r,prusa3d/Slic3r,xoan/Slic3r,platsch/Slic3r,lordofhyphens/Slic3r,platsch/Slic3r,platsch/Slic3r,xoan/Slic3r,tmotl/Slic3r,tmotl/Slic3r,alexrj/Slic3r,xoan/Slic3r,mcilhargey/Slic3r,curieos/Slic3r,prusa3d/Slic3r,xoan/Slic3r,xoan/Slic3r,lordofhyphens/Slic3r,alexrj/Slic3r,lordofhyphens/Slic3r,tmotl/Slic3r,tmotl/Slic3r,pieis2pi/Slic3r,mcilhargey/Slic3r,tmotl/Slic3r,platsch/Slic3r,prusa3d/Slic3r,platsch/Slic3r,curieos/Slic3r,lordofhyphens/Slic3r,alexrj/Slic3r,mcilhargey/Slic3r,mcilhargey/Slic3r,mcilhargey/Slic3r,pieis2pi/Slic3r,xoan/Slic3r,pieis2pi/Slic3r,mcilhargey/Slic3r,curieos/Slic3r,prusa3d/Slic3r,curieos/Slic3r,alexrj/Slic3r,alexrj/Slic3r,curieos/Slic3r,mcilhargey/Slic3r,pieis2pi/Slic3r,tmotl/Slic3r,lordofhyphens/Slic3r