ResultsView: Add pending state, rename some vars

• Adds a "pending" state to the ResultsView component (used during the brief delay while the API fetches results)
• Names like "page", "article", etc were getting kind of overloaded in this file, so some variables have been renamed in an attempt to clarify things.
  • "page" now reserved for pagination-related usage
  • "backlinks" are the actual results being displayed
  • "article" refers to the user-provided page we are checking