Why isn't the URI in a concept page clickable ?

## At which URL did you encounter the problem?
Any concept page like http://skosmos.dev.finto.fi/unesco/en/page/C00992

## What steps will reproduce the problem?
1. Look at the URI : it is not clickable, while it is the canonical URI of the Concept

## What is the expected output? What do you see instead?
Expected output : the URI is clickable.

