Don't offset border with Horizontal Expansion any more
Don't offset border with Horizontal Expansion any more

This is now done in the convex hull of the mesh itself.

Contributes to issue CURA-2407.

Curahelper/Cura,ynotstartups/Wanhao,Curahelper/Cura,hmflash/Cura,hmflash/Cura,fieldOfView/Cura,ynotstartups/Wanhao,fieldOfView/Cura