7ktTube fixes

This script corrects UI of youtube.com after implementation of 7ktTube | 2016 REDUX script:
- progress bar is visible
- video duration is bigger
- "Create" icon is visible
- thumbnails in playlists are bigger
- playlist description

(Various fixes for computed buttons were removed in version 1.2, because the author of 7ktTube changed the relevant section and such fixes are no longer necessary.)

7ktTube | 2016 REDUX script can be downloaded here: https://7kt.se/