Fix: Swimming order

[crosborn]

order button is temperamental. Also add text on page explaining how it works

[peskdale]

Can you elaborate? There isn't an order button. There's a text box which you enter lane numbers into (which is already explained in the interface).

[joshhodgson]

Works fine for me - @crosborn can you suggest wording which would be better? Or explain the issues you had? Currently, it is used to display 3 swimmers, in order, next to their lane number. The first swimmer gets the time from the stopwatch too