Comment and update to modern Underscore/Backbone
Comment and update to modern Underscore/Backbone

Reviewed comments for accuracy

Replaced a few loops and bind methods with Backbone/Underscore equivalents

Removed the "setupFileInput" method since it was not being called from anywhere I could find.

c/javascripts/ui/documents/upload_dialog.js

ivarvong/documentcloud,documentcloud/documentcloud,moodpo/documentcloud,ivarvong/documentcloud,gunjanmodi/documentcloud,moodpo/documentcloud,Teino1978-Corp/Teino1978-Corp-documentcloud,documentcloud/documentcloud,dannguyen/documentcloud,gunjanmodi/documentcloud,Teino1978-Corp/Teino1978-Corp-documentcloud,ivarvong/documentcloud,gunjanmodi/documentcloud,gunjanmodi/documentcloud,documentcloud/documentcloud,Teino1978-Corp/Teino1978-Corp-documentcloud,monofox/documentcloud,ivarvong/documentcloud,monofox/documentcloud,dannguyen/documentcloud,documentcloud/documentcloud,dannguyen/documentcloud,monofox/documentcloud,monofox/documentcloud,moodpo/documentcloud,dannguyen/documentcloud,Teino1978-Corp/Teino1978-Corp-documentcloud,moodpo/documentcloud