SLA archive import with miniz, marching square bugfixes

Fix compilation on Windows


Fix array subscript out of range error in MarchingSquares


Fix normals of mesh constructed from slices


Improve performance of mesh construction from slices

src/slic3r/GUI/Plater.cpp

@@ -73,7 +73,7 @@
 #include "../Utils/PrintHost.hpp"
 #include "../Utils/FixModelByWin10.hpp"
 #include "../Utils/UndoRedo.hpp"
-#include "../Utils/SLAZipFileImport.hpp"
+#include "../Utils/SLAImport.hpp"
 #include "RemovableDriveManager.hpp"
 #if ENABLE_NON_STATIC_CANVAS_MANAGER
 #ifdef __APPLE__
@@ -4263,11 +4263,7 @@ void Plater::import_sl1_archive()
     if (dlg.ShowModal() == wxID_OK) {
         try {
             TriangleMesh mesh = import_model_from_sla_zip(dlg.GetPath());
-            ModelObject * obj = p->model.add_object(wxFileName(dlg.GetPath()).GetName(), "", mesh);
-            if (obj) {
-                obj->add_instance();
-                update();                
-            }
+            p->sidebar->obj_list()->load_mesh_object(mesh, wxFileName(dlg.GetPath()).GetName());
         } catch (std::exception &ex) {
             show_error(this, ex.what());
         }