Drop down does not work with debugInfoEnabled disabled

[fdmota]

Turning off debugInfoEnabled (as recommended in https://docs.angularjs.org/guide/production) prevents accessing the scope from the DOM which cause angular-ui-tab-scroll to throw an error while is calculating the list items for the drop down.

VM6403:27 TypeError: Cannot set property 'tabScrollTitle' of undefined
at angular-ui-tab-scroll.js:354
at Object.p [as forEach] (angular.js:402)
at m.$scope.reCalcAll (angular-ui-tab-scroll.js:348)
at m.$scope.init (angular-ui-tab-scroll.js:329)
at angular-ui-tab-scroll.js:366
at angular.js:20119
at e (angular.js:6274)
at angular.js:6554