ENH:add "only_external_material" logic

jira: STUDIO-9985
Change-Id: Iac15989bea39d1571eab66199737472381832017
(cherry picked from commit d317055f421ba2037f983ad1d99cd0e268b7274b)

src/slic3r/GUI/SyncAmsInfoDialog.hpp

@@ -355,6 +355,7 @@ public:
     struct InputInfo
     {
         wxPoint dialog_pos{wxPoint(400, 200)};
+        bool    only_external_material = false;
     };
     struct ResultInfo
     {};