fix(dropdownToggle): Dropdown not repositioned when window resized

[lerio]

Related to #258.

When window is resized, the open dropdown is not correctly repositioned below its toggle. Now the behaviour is correct either when the dropdown is left or right aligned.

Before:

After:

[jbrowning]

Any reason why you use bind() here instead of on() like the rest of the event listeners?

[jbrowning]

We need to clean up this event listener on $destroy. See https://code.angularjs.org/1.4.7/docs/guide/directive#creating-a-directive-that-manipulates-the-dom

[lerio]

No particular reason for bind(), changing.
Also, added cleanup on $destroy as suggested.

[jbrowning]

Thanks for sending this in, @lerio. In addition to my previous comments can you please try to add some tests for this behavior?

[lerio]

Did the required changes, but I didn't add any test yet. Can you suggest me a way to test $window resize on jasmine?

[danieljin]

Bump