fix sleep after playlist not toggling nightmode (#336)

Wrong property was passed to the sleep handler.
Fix copy & paste error

src/Cmd.cpp

@@ -114,7 +114,7 @@ void Cmd_Action(const uint16_t mod) {
 			gPlayProperties.playUntilTrackNumber = 0;
 			gPlayProperties.sleepAfterPlaylist = !gPlayProperties.sleepAfterPlaylist;
 
-			Cmd_HandleSleepAction(gPlayProperties.sleepAfterCurrentTrack, modificatorSleepAtEOP, "EOP");
+			Cmd_HandleSleepAction(gPlayProperties.sleepAfterPlaylist, modificatorSleepAtEOP, "EOP");
 			System_IndicateOk();
 			break;
 		}