Add possibility to highlight runner(s) or club in class list

[fredricj]

If you are trying to track multiple runners it can be hard to find them in the class lists. In the club list you can easily see them but it only lists the start, finish and total time, so if you are interested in the intermediate time or position it isn't useful.

For tracking purposes it would be useful to add the ability to highlight runners or the club and store this throughout the competition