Issues browsing projects as an anonymous user

[lorenzo-cavazzi]

There are a couple of glitches when browsing the UI as an anonymous user:

• On the project's overview page, the number of stars is updated correctly but there is an endless spinning wheel.
  
• When clicking on the global Projects page, it occasionally shows no projects. This seems to be cause by a few extra queries to the projects endpoint including the membership=true flag (this seems to be caused by a redirect).
  
• After going to the Projects page, the back button of the browser doesn't behave correctly anymore, the user can go further back (likely to be related to the above auto-redirect)