Rename the Formats (Mini Apps) into their plural

Not only I myself was 2-3 days confused from the singular form of the Formats names. Also at least one other user here didn't get it what the formats are about. The singular form brings us mentally somehow on a totally wrong ship and causes confusion.

I mean, in principle, the format "Page" is a Collection of Pages. Therefore it should have the name "Pages".
That would make everything clear on the first glance and help new users to get it right.