mission var findable.
mission loading correctly.
frame index fixed.
frame load ok
rivets binding after after_action, and get frame in and out is available.
add readonly in page frame.
action on GUI will send a request to PDL to keep the same value of current mission.
add interval between command request and lock off request.
made a load_frame_data methods.
the functions of compositing layer data from PDL to Javascript.
cannot load everything once from PDL memory caused, the time of callback.
make the callback as a sequence
make ajax request as synchronous request.
adopt new request method by routines.