apps: Add "keep current track when replacing playlist" setting

Add a setting that makes Play and Play Shuffled in the playlist
context menu leave the current song (if any) playing when they
replace the playlist. Default to on, since this was the behavior
of the old "Clear List & Play Next" option.

Change-Id: I1340aed5c28bb3244e36d0953b3308ae59681c97

1 files changed, 4 insertions, 1 deletions

diff --git a/manual/working_with_playlists/main.tex b/manual/working_with_playlists/main.tex
index 0d1ab7ef04..8571aac61c 100644
--- a/manual/working_with_playlists/main.tex
+++ b/manual/working_with_playlists/main.tex
@@ -118,7 +118,10 @@ following two options will achieve that effect.
 
 \begin{description}
 \item [Play.] Replace all entries in the dynamic playlist with the selected
-  tracks and start playing the new playlist immediately.
+  tracks. If \setting{Keep Current Track When Replacing Playlist} is set to
+  \setting{Yes}, the new tracks will play after the current track finishes
+  playing; if no track is playing or the setting is \setting{No}, the new
+  tracks will begin playing immediately.
 
 \item [Play Shuffled.] Similar, except the tracks will be added to the new
   playlist in random order.