Upload progress bar now displays informations about uploads...

Upload progress bar now displays informations about uploads, uploades size (e.g. 12kB of 3MB) and the current speed.

Making this PR for this: #8105 

Here is a live test:
user: test
pw: bla
http://flutterb.at/owncloud-testserver

should replace https://github.com/owncloud/core/pull/10324
It is though. Closes the media query from the first line
`@media only screen and (max-width: 768px) {`

(We don’t indent the whole file because that would be ridiculous. In other files though there is a comment before that brace noting that it’s closing the media query. @luckydonald maybe you can add that?)

@bantu does this pull request look good otherwise?