refactor(dashboard): Restructured front-end dashboard code.

mod/dashboard/app/scripts/common/directives/highlight.js

@@ -0,0 +1,13 @@
+'use strict';
+
+angular.module('etcdControlPanel')
+.directive('highlight', function() {
+  return {
+    restrict: 'A',
+    link: function(scope, element, attrs) {
+      if('#' + scope.etcdPath === attrs.href) {
+        element.parent().parent().addClass('etcd-selected');
+      }
+    }
+  };
+});