Clicking back to search results doesn't work

[mzedeler]

To reproduce:

• Log in as guest (click "Prøv E17 Direkte uden login" on the login page).
• Click the search button.
• Enter "farao" and click the search button.
• Click on the first book item.
• Click "Tilbage".

Expected: the previous list with search results. Actual: the screen is empty apart from the top bar.

[kirkby]

Fixed.

[mzedeler]

Tested: it works.