Hide slicing results after Delete All command

src/slic3r/GUI/Plater.cpp

@@ -1717,6 +1717,8 @@ void Plater::priv::reset()
     object_list_changed();
     update();
 
+    // The hiding of the slicing results, if shown, is not taken care by the background process, so we do it here
+    this->sidebar->show_sliced_info_sizer(false);
 
     auto& config = wxGetApp().preset_bundle->project_config;
     config.option<ConfigOptionFloats>("colorprint_heights")->values.clear();