Fixed incorrect check for whether to update state or insert new one in save_question_session()
Deal with manually graded states correctly during regrading
Increase state sequence number during manual grading
Supplied missing userid to quiz_save_best_grade() during manual grading
[Fix] changed the print_string to get_string so it may be passed to notify
[Change] The close window button is now centered
[Change] Refreshes the parent window when the close window button is pushed
