Several overlappings in the profile.

[dertuxmalwieder]

Firefox on Windows 10:

• Profile -> "Edit bio": This button is smaller than the container. Fix: Remove "overflow:hidden" from .user-profile-bio.
• Profile -> contribution years: The list wrapper partially overlaps the rest of the elements. Suggestion for a fix: Make the background grey as well and only give the ul a white background?

I'll be home later, I can't really contribute PRs from here. Just in case you'll ask me. ;-)