(A11y severity 4) Consolidate adjacent links

[sathomas]

There are several instances of adjacent links that navigate to the same location, particularly within the grid boxes. For example, the file preview image or the discussion icon link to the same URL as the heading link below it. Redundant links that redirect to the same location results in additional navigation and repetition for keyboard and screen reader users. If possible, combine these links into a single link.

[nicolaasmatthijs]

Especially for the tiles, it will be really hard to replicate the current behaviour and remove links. However, perhaps we can remove the tabindex on the thumbnail link.