Revert "Synchronize also with "Add to AutoDJ" buttons in context menu"

This reverts commit 9e1eec4.

src/library/autodj/autodjprocessor.h

@@ -207,9 +207,6 @@ class AutoDJProcessor : public QObject {
     void transitionTimeChanged(int time);
     void randomTrackRequested(int tracksToAdd);
 
-  public slots:
-    void playlistFirstTrackChanged();
-
   private slots:
     void crossfaderChanged(double value);
     void playerPositionChanged(DeckAttributes* pDeck, double position);
@@ -222,6 +219,7 @@ class AutoDJProcessor : public QObject {
     void playerLoadingTrack(DeckAttributes* pDeck, TrackPointer pNewTrack, TrackPointer pOldTrack);
     void playerEmpty(DeckAttributes* pDeck);
     void playerRateChanged(DeckAttributes* pDeck);
+    void playlistFirstTrackChanged();
 
     void controlEnableChangeRequest(double value);
     void controlFadeNow(double value);

src/library/dao/playlistdao.cpp

@@ -1278,18 +1278,21 @@ void PlaylistDAO::addTracksToAutoDJQueue(const QList<TrackId>& trackIds, AutoDJS
         return;
     }
 
+    // If the first track is already loaded to the player,
+    // alter the playlist only below the first track
+    int position =
+            (m_pAutoDJProcessor && m_pAutoDJProcessor->nextTrackLoaded()) ? 2 : 1;
+
     switch (loc) {
     case AutoDJSendLoc::TOP:
-        insertTracksIntoPlaylist(trackIds, iAutoDJPlaylistId, 1);
-        m_pAutoDJProcessor->playlistFirstTrackChanged();
+        insertTracksIntoPlaylist(trackIds, iAutoDJPlaylistId, position);
         break;
     case AutoDJSendLoc::BOTTOM:
         appendTracksToPlaylist(trackIds, iAutoDJPlaylistId);
         break;
     case AutoDJSendLoc::REPLACE:
-        if (removeTracksFromPlaylist(iAutoDJPlaylistId, 1)) {
+        if (removeTracksFromPlaylist(iAutoDJPlaylistId, position)) {
             appendTracksToPlaylist(trackIds, iAutoDJPlaylistId);
-            m_pAutoDJProcessor->playlistFirstTrackChanged();
         }
         break;
     }