[Refactor] Forbidden DOM manipulation in state controller

[kofronpi]

In angularJS, no DOM manipulation should be done in controllers like this :

    $scope.state_bgcolor = "#f5f5f5";
    $scope.state_bordercolor = "#e3e3e3";

Explanations here http://ng-learn.org/2014/01/Dom-Manipulations/ and at many other places.
Instead one should use angular's directives : https://docs.angularjs.org/guide/directive

I'll do it soon

[mattgu74]

Ok I assigned you to this issue ;)