Added function to return special page as admin page item
Added function to return special page as admin page item

-Used SpecialPageFactory to include pre-defined mediawiki special pages

wikimedia/mediawiki-extensions-SpellingDictionary,ankitashukla/mediawiki-spelling-dictionary,ankitashukla/mediawiki-spelling-dictionary,wikimedia/mediawiki-extensions-SpellingDictionary