Returns one of the images that represent the application.
- image: Name of the image to return, without extension.
The image data, in PNG format and with a content type of image/png.
Botize will invoke this command only if the data returned by the get_app_info command does not contain a images_path element.
The possible values for the image parameter are icon32 and icon48. The former must be a 32x32 pixels image, the later must be a 48x48 pixels image.