Merge branch 'master' of https://github.com/prusa3d/Slic3r

src/slic3r/GUI/GLCanvas3D.cpp

@@ -2313,6 +2313,9 @@ void GLCanvas3D::on_key(wxKeyEvent& evt)
 
 void GLCanvas3D::on_mouse_wheel(wxMouseEvent& evt)
 {
+    if (!m_initialized)
+        return;
+
     // Ignore the wheel events if the middle button is pressed.
     if (evt.MiddleIsDown())
         return;

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -2120,6 +2120,7 @@ void ObjectList::update_selections_on_canvas()
             add_to_selection(item, selection, instance_idx, true);
 
         wxGetApp().plater()->canvas3D()->update_gizmos_on_off_state();
+        wxGetApp().plater()->canvas3D()->render();
         return;
     }