Fix music dir being set in bad place again. Update web calls that backend calls to match const requirements. Have playlist and player part of backend class now for better handling. Set up getting first vote list and sending.

src/GroovePlayer.h

@@ -37,13 +37,16 @@ class GroovePlayerMgr
 public:
     static std::filesystem::path musicScanDir;
     static GroovePlayerMgr* getInstance() {
-        musicScanDir = std::filesystem::current_path()/"music";
         static GroovePlayerMgr instance("music.db");
         return &instance;
     };
     GroovePlayerMgr ( GroovePlayerMgr const&) = delete;
     void operator=( GroovePlayerMgr const&) = delete;
     void shutdown();
+    
+    struct GroovePlaylist* currentPlaylist;
+    struct GroovePlayer* currentPlayer;
+    std::list<const AudioTrack*> currentVoteBatch;
 private:
     enum PlayerEvents {NOTHING, GROOVE_NOWPLAYING, VOTING_ENDED, VOTE_CAST, PLAYING_PAUSED, PLAYING_RESUMED, SKIP_REQUESTED, SKIP_VOTE_CAST, SKIP_VOTING_ENDED, ADMIN_FORCE_SKIP};
     
@@ -54,7 +57,6 @@ private:
     
     std::list<const AudioTrack*> requestQueue;
     std::list<PlayerEvents> lastInternalEvents;
-    GroovePlaylistItem* currentItem;
 
     
     std::thread* grooveEvents;