Drop references to 'rua' in source code

[camfindlay]

Something to tidy up later, while the pattern library is called "rua" we shouldn't make references to that name in the src code itself as we are aiming for generic reusability into other pattern libs later on.

[camfindlay]

Just adding a reference to a comment relating to this d01c89e#r31848807

[camfindlay]

@matt-in-a-hat this is worth noting, nothing to action just yet though.

[matt-in-a-hat]

It's looking pretty clear of "rua", just a couple paths/titles

Nothing in class or js names