Thread:Template talk:Extension/Wrong usage of type = page action?

Going through Category:Page action extensions I though it lists extensions adding page actions or modifying its normal behavior. But it doesn't seem to be true, being Extension:WikEd just one example: it just loads a JavaScript file that alters the page content on the client-side, it has nothing to do with page actions at all. But on the other hand, it doesn't seem to be a more proper categorization of that extension.