Use ui-dropped-event and deprecate the use of cfs-handlebars
added progress

I don’t get why the upload queue is uploading all at once - it seems as
if it doesnt respect the default setting 1 file at a time with 1 chunk
at a time config? @aldeed is something broken in pq or something, can
you verify the behavior guys?
Merged changes from @raix and added many UI niceties.