Add storyviews list filter and use it in view switcher

core/modules/widgets/storyviews.js

@@ -0,0 +1,29 @@
+/*\
+title: $:/core/modules/filters/storyviews.js
+type: application/javascript
+module-type: filteroperator
+
+Filter operator for returning the names of the story views in this wiki
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Export our filter function
+*/
+exports.storyviews = function(source,operator,options) {
+	var results = [],
+		storyviews = {};
+	$tw.modules.applyMethods("storyview",storyviews);
+	$tw.utils.each(storyviews,function(info,name) {
+		results.push(name);
+	});
+	results.sort();
+	return results;
+};
+
+})();