Fixed bugs:
1) Notice: Undefined variable: theNews  in /app/code/local/Rizn/Ubb/Block/Adminhtml/Notifications.php on line 159
2) Warning: Invalid argument supplied for foreach()  in /app/code/local/Rizn/Ubb/Block/Adminhtml/Notifications.php on line 159
3) Undefined index: RZ_HIDE_NOTIF  in /app/code/local/Rizn/Ubb/Block/Adminhtml/Notifications.php on line 68