FIX: parts file download failed && canvas display error

Jira: [STUDIO-13253]
Change-Id: I6ce11c0ceb1c4f7ed49c41eb9c6d7a6d96e866f9
(cherry picked from commit 37f742007bc168d8a3365ca617c7bd27bafca038)

src/slic3r/GUI/SkipPartCanvas.hpp

@@ -150,7 +150,7 @@ public:
     ModelSettingHelper(const std::string &path);
 
     bool                    Parse();
-    std::vector<PlateInfo>  GetPlates();
+    std::vector<ObjectInfo> GetPlateObjects(int plate_idx);
 
 private:
     std::string  path_;