added extra error check in continuous floor music function

-fixed continuous floor music sometimes not working if you had stageAPI running
-fixed music restarting if you moved in or out of a treasure room while in a stageAPI floor or 'override floor' with certain settings
-fixed some stageAPI checks not working if you were running the menu in custom mode and the current track was set to shuffle or random

fixed hush death jingle not playing when used with MMC on Rep+

added option to disable using variant tracks

added alt flash secret room reveal jingle

fixed shuffle setting the current music to devil room if triggered during the mega satan fight

rep+ jingle bugfix

fixed previous fix not working if tainted and regular run start jingles were switched

fixed run start jingle getting cut off by music if set to default