Fix notification issue.

js/util.js

@@ -0,0 +1,25 @@
+.pragma library
+
+function stringToColor(str) {
+    var hash = 0;
+    for (var i = 0; i < str.length; i++) {
+        hash = str.charCodeAt(i) + ((hash << 5) - hash);
+    }
+    var colour = '#';
+    for (var j = 0; j < 3; j++) {
+        var value = (hash >> (j * 8)) & 0xFF;
+        colour += ('00' + value.toString(16)).substr(-2);
+    }
+    return colour;
+}
+
+function pushToStack(stack, page) {
+    if(page && stack.currentItem !== page) {
+        if(stack.depth === 1) {
+            stack.replace(page)
+        } else {
+            stack.clear()
+            stack.push(page)
+        }
+    }
+}