Active 8.x javascript issues

User pain Issue Created
51% details#2666746: [PERFORMANCE] Simultaneous file uploads re-posting data 2016-02-11
51% details#2809281: Use ES6 for core JavaScript development 2016-09-30

Sorting of the JavaScript issue queues based on user pain rating.

User pain = Type * Priority * Public / Max score

Highlighted rows are killer issues , issues that take a significant effort to fix due to their complexity.