Allow the annotation serializer to extract project_id for use in some widget when it is provided in the data
.Ldt-MashupPlayer-Media {
position: absolute;
}
.Ldt-MashupPlayer-Waiting {
position: absolute; left: 0; top: 0; width: 100%; height: 100%;
background-color: rgba(120, 120, 140, .6);
background-image: url(img/reel.gif);
background-position: center;
background-repeat: no-repeat;
}