Sliders stick to mouse when using the directive anywhere on the page

[mawie81]

We just ran into the following issue:
If you have a slider - <input type='range'> - anywhere on your page you can click it once and then the thumb will stick with your mouse.

Plunker: http://plnkr.co/edit/sWJmTWImtunqLj819XFQ?p=preview
Try to move the slider at the top of the page.
If you remove the div with ng-scrollable the slider is working again.
It doesn´t matter if the slider is inside an element with ng-scrollable or not.

[echa]

After banging my head against this and #30 I realised it's the way event handlers are attached to the document node. Fix is on the way. I don't include your patch since my other solution is more general, but thanks anyways.