Plural problem in website

It’s quite minor, but I feel this change would benefit the quality and feel of the Exercism website. On the contributions page, I tried marking all as seen, and get this:

The item I propose to change is “mark all 1 contributions” to “mark all 1 contribution” - or even better, mark “1 contribution”. The “s” and “all” should be dropped if there’s only one contribution.

@dem4ron One for you I think!