Free your challenges/Backlog

Userstories

 * As an employee I would like to share my challenges anonimously.
 * Challenges that are inactive, don't get any views, should be archived automatically.
 * As an admin-user I would like to categorize challenges, so users can easily find the sustainability challenges for example.

To-do

 * On 15.10.17 shared with Part-up team via WhatsApp.
 * Share with team behind The Serendipity Machine.
 * Add a hyperlink to the mockup. You could link to the part-up. It would be nice if you can see how many supporters/ partners are in the part-up.