FIX: fix plate name encoding issue

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

src/slic3r/GUI/GLTexture.cpp

@@ -483,7 +483,7 @@ bool GLTexture::generate_from_text(const std::string &text_str, wxFont &font, wx
         return false;
     }
 
-    wxString msg = text_str;
+    wxString msg = from_u8(text_str);
     wxMemoryDC memDC;
 
     memDC.SetFont(font);