Changed function name to avoid confusion
Changed function name to avoid confusion

Renamed the functions mavlink_message_handler_sort_msg_callback and mavlink_message_handler_sort_cmd_callback that did not sort the whole list, only the last element. 

mavlink_message_handler_sort_msg_callback -> mavlink_message_handler_sort_latest_msg_callback
mavlink_message_handler_sort_cmd_callback -> mavlink_message_handler_sort_latest_msg_callback
lis-epfl/MAVRIC_Library,gburri/MAVRIC_Library,lis-epfl/MAVRIC_Library,gburri/MAVRIC_Library,gburri/MAVRIC_Library,lis-epfl/MAVRIC_Library