Fix message text in two-part tariff review screen

[Jozzey]

On the Review screen when there are licences in review we show a message letting users know how many there are. Currently when there is only 1 licence in review the text displays as 1 licences whereas it should be singular and display 1 licence.

This PR corrects that text.

[Cruikshanks]

Sorry, I know I'm pushing a quick fix to be something bigger.

But if we pushed this logic into the presenter, not only would we make the view simpler we could also add a unit test to cover this.

I'd push for the review-bill-run.presenter.js to be updated to generate the message. The view can then be completely 'dumb' and just display whatever message is determined by the presenter.

[Jozzey]

Sorry, I know I'm pushing a quick fix to be something bigger.

But if we pushed this logic into the presenter, not only would we make the view simpler we could also add a unit test to cover this.

I'd push for the review-bill-run.presenter.js to be updated to generate the message. The view can then be completely 'dumb' and just display whatever message is determined by the presenter.

That was an option I was considering but didn't bother as it was supposed to be a quick fix and now it isn't 😁 Still shouldn't take long.