cropping mesh (and clipCorners) no longer works

• Concern : API/UI
• Platform : macOS/Linux/Windows
• Problem Description : Cropping the corners of the mesh (clipCorners in Project.showResults) no longer crops the corners
• How to reproduce it : Use the code below or in the GUI simply check "Crop corners" checkbox in the inversion>results tab
  

k = Project(typ='R2')
k.setElec(np.c_[np.linspace(0,5.75, 24), np.zeros((24, 2))])
k.createMesh()
k.addRegion(np.array([[1,0],[2,0],[2,-0.5],[1,-0.5],[1,0]]), 10, -3)
k.createSequence()
k.forward(noise=5)
k.invert()
k.showResults(index=1, clipCorners=True)

You can also see the issue exists when inverting a 2D dataset with topography. The bottom of the mesh does not follow the topography anymore