define custom dojo modules with define() instead of require(), update startup module dependencies

js/PrefFilterStore.js

@@ -0,0 +1,22 @@
+define(["dojo/_base/declare", "dojo/data/ItemFileWriteStore"], function (declare) {
+
+	return declare("fox.PrefFilterStore", dojo.data.ItemFileWriteStore, {
+
+		_saveEverything: function (saveCompleteCallback, saveFailedCallback,
+								   newFileContentString) {
+
+			dojo.xhrPost({
+				url: "backend.php",
+				content: {
+					op: "pref-filters", method: "savefilterorder",
+					payload: newFileContentString
+				},
+				error: saveFailedCallback,
+				load: saveCompleteCallback
+			});
+		},
+
+	});
+});
+
+