Ensure order of operations for calculating min_dz, also apply adjustment to first layer height.
Ensure order of operations for calculating min_dz, also apply adjustment to first layer height.

alexrj/Slic3r,tmotl/Slic3r,pieis2pi/Slic3r,curieos/Slic3r,xoan/Slic3r,curieos/Slic3r,xoan/Slic3r,alexrj/Slic3r,curieos/Slic3r,alexrj/Slic3r,lordofhyphens/Slic3r,curieos/Slic3r,lordofhyphens/Slic3r,tmotl/Slic3r,curieos/Slic3r,alexrj/Slic3r,lordofhyphens/Slic3r,lordofhyphens/Slic3r,lordofhyphens/Slic3r,curieos/Slic3r,xoan/Slic3r,tmotl/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r,tmotl/Slic3r,xoan/Slic3r,alexrj/Slic3r,pieis2pi/Slic3r,lordofhyphens/Slic3r,tmotl/Slic3r,pieis2pi/Slic3r,pieis2pi/Slic3r,xoan/Slic3r,pieis2pi/Slic3r,xoan/Slic3r,tmotl/Slic3r