NEW: [STUDIO-3710] add Bambu Cube V2

Thank you very much to Thrutheframe for providing us with a very
valuable model for our software. We sincerely appreciate your time and
effort in helping us improve the project. Here is the model address:
https://www.printables.com/model/222285-bambu-lab-xyz-calibration-cube.
Thank you again, Thrutheframe.

Change-Id: I200fd23ab7a09683b2610664c8e09ae53fc42133

src/slic3r/GUI/GUI_Factories.cpp

@@ -492,7 +492,7 @@ wxMenu* MenuFactory::append_submenu_add_generic(wxMenu* menu, ModelVolumeType ty
 
     if (type == ModelVolumeType::INVALID) {
         sub_menu->AppendSeparator();
-        for (auto &item : {L("Bambu Cube"), L("3DBenchy"), L("ksr FDMTest")}) {
+        for (auto &item : {L("Bambu Cube"), L("Bambu Cube V2"), L("3DBenchy"), L("ksr FDMTest")}) {
             append_menu_item(
                 sub_menu, wxID_ANY, _(item), "", [type, item](wxCommandEvent &) { obj_list()->load_generic_subobject(item, type); }, "", menu);
         }

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -2055,6 +2055,8 @@ static TriangleMesh create_mesh(const std::string& type_name, const BoundingBoxf
         mesh = TriangleMesh(its_make_cone(0.5 * side, side));
     else if (type_name == "Bambu Cube")
         mesh.ReadSTLFile((Slic3r::resources_dir() + "/model/Bambu_Cube.stl").c_str(), true, nullptr);
+    else if (type_name == "Bambu Cube V2")
+        mesh.ReadSTLFile((Slic3r::resources_dir() + "/model/Bambu_Cube_V2.stl").c_str(), true, nullptr);
     else if (type_name == "3DBenchy")
         mesh.ReadSTLFile((Slic3r::resources_dir() + "/model/3DBenchy.stl").c_str(), true, nullptr);
     else if (type_name == "ksr FDMTest")