fix(dropdown): remove extra uib-keyboard-nav

[Foxandxss]

BREAKING CHANGE: keyboard-nav for the dropdown is not longer a directive and to use it you have to use keyboard-nav instead of uib-keyboard-nav.

[Foxandxss]

Tell me that I am not crazy and that the guy that implemented this, did it twice... Why do we need the whole keyboard nav both in a directive and also inside the main controller? Works directly as is.

Tweaked a bit the demo to include another keyboard-nav.

And don't worry about the docs, I have to rewrite them entirely.

PS: Made it a fix so the BC will show up

[RobJacobs]

LGTM

[icfantv]

You're not crazy. I noticed that before and it was the cause of a bunch of WTFs when trying to write tests because the code that you thought should be called was never getting called. E.g. when you trigger the keydown event in jasmine it wasn't using the event handler on the directive - it was using the main one. But in an actual web page, the opposite is true. It took me a days to figure that out. Very frustrating.

[Foxandxss]

It took me a while too to figure it out.

[Foxandxss]

Hold on this one, I saw a big stupidity on the tests.

[Foxandxss]

Alright, fixed.