NEW: [STUDIO-2476] design_staffpick

This reverts commit 4d13a44a2e4136d0c2e173e367e13f6a6ba00670.

Reason for revert: 123

Change-Id: I008a0ab3540589e5938fb3e1814571e00c467227

src/slic3r/GUI/GUI_App.hpp

@@ -439,6 +439,7 @@ public:
     void            stop_sync_user_preset();
     void            start_http_server();
     void            stop_http_server();
+    void            switch_staff_pick(bool on);
 
     void            on_show_check_privacy_dlg(int online_login = 0);
     void            show_check_privacy_dlg(wxCommandEvent& evt);