The problem that I identified earlier as a Safari bug turned out to be a
bug in main/recent route. Not calling super in deactivate resulted in
code to remove observer not being executed at all.
When transitioning from recent route to a specific repo deactivate is
not called for some reason on Safari. It seems like a bug in Ember.js,
but I need to investigate more.
A solution is to also try to remove observer in reset controller
