Add GA tracking to Fx refresh button. Bug 1027318.

media/js/firefox/new.js

@@ -73,6 +73,8 @@

                        // DOM may not be ready yet, so bind filtered click handler to document
                        $document.on('click', '#refresh-firefox', function() {
                            gaTrack(['_trackEvent', '/new Interaction', 'Refresh Firefox', 'Firefox Desktop']);

                            uiTourSendEvent('resetFirefox');
                        });
                    }