Various fixes.

see #204

static/js/notify.js

@@ -50,7 +50,7 @@
             this.$element.append(nbox);
             if (timer != undefined) {
                 window.setTimeout(function() {
-                    $('.alert').alert('close');
+                    nbox.alert('close');
                 }, timer);
             }
             return this;

static/js/utils.js

@@ -40,7 +40,10 @@ function modalbox(e, css, defhref, defcb) {
 }
 
 function modalbox_autowidth(e) {
-    modalbox.apply(this, [e, {width: 'auto'}]);
+    modalbox.apply(this, [e, {
+        width: 'auto',
+        'margin-left': function() { return -($(this).width() / 2); }
+    }]);
 }
 
 /*