message: doc: add cmder icon to ThirdPartyToolProfiles
diff: @@ -30,6 +30,7 @@ Assuming that you've installed cmder into `%CMDER_ROOT%`:
  {
  "commandline" : "cmd.exe /k \"%CMDER_ROOT%\\vendor\\init.bat\"",
  "name" : "cmder",
  + "icon" : "%CMDER_ROOT%/icons/cmder.ico",
  "startingDirectory" : "%USERPROFILE%"
  }
  ```
  