Implemented possibility to create "shape" as an object (#2865)

src/slic3r/GUI/Plater.cpp

@@ -4877,6 +4877,11 @@ GLCanvas3D* Plater::canvas3D()
     return p->view3D->get_canvas3d();
 }
 
+BoundingBoxf Plater::bed_shape_bb() const
+{
+    return p->bed_shape_bb();
+}
+
 PrinterTechnology Plater::printer_technology() const
 {
     return p->printer_technology;