Revert "Implement resizable left column in preset editor. #3151"
Revert "Implement resizable left column in preset editor. #3151"

This reverts commit 4b30d67e54dcc6ec1d4aff0c09370fde00c1e07f.

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