[IDEA] "Only when idle" option on instant play

[the_bertrum]

But... No Action turns off instant play so you can't accidentally clear a playlist...and you still have all the options clear/play add/play etc by clicking on the 3dot menu .... so why do we need yet another duplicate...?

I don't really mind either way about the clearing of the playlist, it's the stopping playing the thing that's playing now that's the issue.
At the moment we have the choice between always needing to tap more than once to get something to play or having a single tap play something right away regardless of what's already playing.  I'm simply proposing a third option of a single tap only playing if nothing currently is.  I don't see this as a duplication any more than the other two instant play actions are. 

Still, if its going to cause bother I'll just turn off instant play and live with the friction of two clicks to play.