Review categorisation of disabled sports

[ldodds]

In the initial editors draft, the merged activity list includes disabled sports as variants of another sport, e.g. wheelchair football is a narrower term than football. This has been applied more or less consistently across the list. But is this the right way to organise the list?

Disabled sports and activities can be highlighted as a Collection (see #1) which would provide an alternative way to highlight those activities for relevant audiences.