Improvement in Downloads tab

It seems like there is currently pause/resume is not implemented while downloading videos
It would be good to have pause and resume support and also an option to cancel download

Currently when downloading no information is displayed while downloading

Thank you very much

[CookieJarApps]

I've made the downloads show up, with their percentages, in the downloads list while downloading in commit 79b247b, I'll start working on the cancel/pause buttons now.