fix game asset loading for real (#861)

fix copy paste not using timeline marker's time
correct more uses of swung / unswung beat

Assets/Scripts/Conductor.cs

@@ -167,7 +167,9 @@ namespace HeavenStudio
 
             SeekMusicToTime(startPos, offset);
 
+            songPos = startPos;
             songPosBeat = GetBeatFromSongPos(time);
+            songPositionInBeatsAsDouble = GetSwungBeat(songPosBeat);
 
             gameManager.SetCurrentEventToClosest(beat, true);
         }