action tracks should be marked as played after acting on them

[dieterdeyke]

Sometimes I use bongo-sprinkle-mode. bongo-sprinkle-amount is set to
it's default value of 5, therefore bongo initially keeps 5 unplayed
tracks at the end of the playlist. When I need to do something else
for a while, I type '1 C-c C-s' to make bongo stop after the current
track has finished. When I want to listen to music again, I position
point to the track after the action track, and hit return. From this
time on bongo only keeps 4 unplayed tracks at the end, because the
action track was not marked as played. If I repeat the whole
procedure, I am down to 3 unplayed tracks.

I think that in order to fix this the stop action track has to be
marked as played when it was acted upon.