FIX: fix plate name encoding issue

Change-Id: Ia89b2c5bbb4519ed938ae23ff124719cfe6203de
Signed-off-by: Stone Li <stone.li@bambulab.com>

src/slic3r/GUI/PartPlate.hpp

@@ -149,7 +149,7 @@ private:
     DynamicPrintConfig m_config;
 
     // part plate name
-    std::string          m_name;
+    std::string          m_name;        // utf8 string
     bool                 m_name_change = false;
     GeometryBuffer       m_plate_name_icon;
     mutable unsigned int m_plate_name_vbo_id{0};