* Changed Special:RecentChanges and Special:RecentChangesLinked to use the local...

* Changed Special:RecentChanges and Special:RecentChangesLinked to use the local context instead of global variables
* Added context to ChangesList
* Added new factory for ChangesList and subclasses in ChangesList::newFromContext() and modified ChangesList::newFromUser() to call it with the main context since anyway User::getSkin() return the Skin from the main context, so this won't change anything but the User::getOption() call
* Updates Special:RecentChanges and Special:Watchlist to use that new function
* Call Linker methods statically
* Use Linker::linkKnown() instead of Linker::link() where possible
* In Special:Watchlist: Use wfMessage() instead of OutputPage::addWikiMsgArray() with the third parameter