NEW: add track events for debugging network

Change-Id: I671f91b4af00277236ca71014f8d667109756d00
Signed-off-by: Stone Li <stone.li@bambulab.com>

src/slic3r/GUI/GUI_App.hpp

@@ -442,6 +442,7 @@ public:
     void            on_check_privacy_update(wxCommandEvent &evt);
     bool            check_privacy_update();
     void            check_privacy_version(int online_login = 0);
+    void            check_track_enable();
 
     static bool     catch_error(std::function<void()> cb, const std::string& err);