Canonicalise blue-shirt vs blueshirt vs Blueshirt

[PeterJCLaw]

We have a couple of spellings for this friendly name for our volunteers, we should pick one and stick to it.

At least the docs and website will need updating once we've decided, since they each currently have examples of both spellings.

[samjmartin04]

I feel as long as I've been involved, the preference seems to have been toward Blueshirt, with blueshirt sometimes being used. I've very rarely seen blue-shirt.

[PeterJCLaw]

Yeah, agree we usually have it as one word. I think that's what's in our glossary too.