Rearranged site link views

Intermediate step on the way to implementing the new UI:
- Replaced <table> HTML structure with <ul>
- Language name is not displayed anymore
- Removed pointless message about site links being complete
- Implemented temporary css media query for already displaying the site links next to the
  main entity content if the viewport is wide enough.

Change-Id: I01a663381e4b5f9637bbf28f892e4cf3a1f94582
Merge "Rearranged site link views"