added conference wide information page and linked to the admin sidebar

app/controllers/admin/conferences_controller.rb

@@ -173,6 +173,12 @@ module Admin
       end
     end
 
+    def conference_wide_screen
+      #To display sponsors in the conference wide information page
+      @conference = Conference.find_by(short_title: params[:id])
+      @sponsors = @conference.sponsors
+    end
+
     private
 
     def conference_params