bug: Can't close popup

**Type**: bug

**Platform**: all 

Hi,

The second popup gets stuck if the first popup was closed before it was displayed (here is codepen: http://codepen.io/alextrs/pen/ZbGxEX). We start seeing this issue after upgrade from BETA-14 to 1.0.1. Looks like it was broken as part of the fix for #3131.

**popup.js**

``` javascript
398: $timeout(popup.show, showDelay, false);
```

Thanks