Returntoloop

[kristinrma]

in startupdatingcallbackwithposition(), added condition to return to loop start if curr reaches the end of song

[howardwang00]

I think the current implementation has a race condition, where the looping check and the end of song check are competing. When I pause the music, drag the seekbar to the end, then set the end loop, half of the time it goes to the start marker, and otherwise it just restarts the song. I think we need to look at where it restarts the song itself and add that edge case there.