Bind Play to Backspace by default

src/actions.cpp

@@ -797,6 +797,11 @@ void DeleteStoredPlaylist::run()
 	myPlaylistEditor->requestPlaylistsUpdate();
 }
 
+bool ReplaySong::canBeRun()
+{
+	return Status::State::currentSongPosition() >= 0;
+}
+
 void ReplaySong::run()
 {
 	Mpd.Play(Status::State::currentSongPosition());

src/actions.h

@@ -495,6 +495,7 @@ struct ReplaySong: BaseAction
 	ReplaySong(): BaseAction(Type::ReplaySong, "replay_song") { }
 	
 private:
+	virtual bool canBeRun() override;
 	virtual void run() override;
 };
 

src/bindings.cpp

@@ -610,6 +610,7 @@ void BindingsConfiguration::generateDefaults()
 	{
 		bind(k, Actions::Type::JumpToParentDirectory);
 		bind(k, Actions::Type::ReplaySong);
+		bind(k, Actions::Type::Play);
 	}
 	if (notBound(k = stringToKey("f")))
 		bind(k, Actions::Type::SeekForward);

src/screens/help.cpp

@@ -178,7 +178,7 @@ void write_bindings(NC::Scrollpad &w)
 	key(w, Type::Pause, "Pause");
 	key(w, Type::Next, "Next track");
 	key(w, Type::Previous, "Previous track");
-	key(w, Type::ReplaySong, "Replay the current song");
+	key(w, Type::ReplaySong, "Replay current song");
 	key(w, Type::SeekForward, "Seek forward in playing song");
 	key(w, Type::SeekBackward, "Seek backward in playing song");
 	key(w, Type::VolumeDown,