On the topic of the fix not working for mouse-based selection of autocomplete choices - this most likely cannot be fixed with the current JS libraries we use, at least not in a clean manner.

The reason is that triggering of JavaScript events on autocomplete of input fields in forms is browser dependent. In Firefox and in Chrome, the change event is triggered on tabbing out of the field after choosing a value from the autocomplete interface. No event is triggered when the mouse is used to select an element. Detecting a change in the field requires polling of the DOM state, and this style is not recommended for Backbone.js apps - models and views in Backbone are declared with bindings on JavaScript events. We need to use something like AngularJS that continuously polls the DOM for changes in the view state and updates the JavaScript models/views.

I would recommend closing this.