Improve keyupload-styling, show default tab-content.

Flattened styles a little, using more classes.
Unfortuntately I can't find a way to visually highlight the tab-links in
combination with showing default tab-content (would work only if the
last tab would be the default-tab).
1 job for paz/overhaul in 4 minutes and 3 seconds (queued for 1 second)