message: Added context menu dicts
diff: "message": "Cambridge"
  },
  + "context_youdao": {
  + "description": "context menu",
  + "message": "Youdao"
  + },
  +
  + "context_dictcn": {
  + "description": "context menu",
  + "message": "Dictcn"
  + },
  +
  + "context_iciba": {
  + "description": "context menu",
  + "message": "iciba"
  + },
  +
  "context_bing_dict": {
  "description": "context menu",
  "message": "Bing Dict"
  