set_as_last_used_for_type
Description:
Sets the application as the last used application for a given type.
This will make the application appear as first in the list returned by get_recommended_for_type, regardless of the default application for that content type.
Parameters:
| this | 
           a AppInfo.  | 
      
| content_type | 
           the content type.  | 
      
Returns:
| 
           true on success, false on error.  |