big style fix

@danielfrndz - nope - the structure is as follows:

```sass
.ingo-popup-wrap | .ingo-login-widget
    .ingo-popup
```

So the *only* thing that is using `content-box` is the outermost wrapper.  Hence my question as to why we are using a different box model on the outermost wrapper and then overriding it inside the wrapper.  (Then we could get rid of lines 29 and 33-35 in less/_widget.less).  @morewings - any thoughts?