Soccer, specific display for substitutes

@lstephan Thanks for your feedback! The players can be sorted by clicking and dragging the handle next to each player in the event box score admin. Substitutes have a .sub class, so you can add something like this to the Custom CSS section (SportsPress > General) to change the styling for those rows:

.sp-event-performance .sub {
color: #888;
background: #eee;
}