HUE-2272 [fb] Improve UX of Copy/Move modal windows

refactoring drag and drop experience
removed modal, added fixed message bar, added css updates
refactored handlers in options
removed queuecomplete and moved to a listener on the instantiated dropzone to properly capture the state of the queue
status bar removed only after the queue is empty as opposed to first success or canceled item in queue
Added fix for displaying separate file percentages; removal of cancel button for items that are completed