How to reproduce:

1. Go to hosts/hostgroups index page

2. Click on create new host/hostgroup - will go to the new host/hostgroup page

3. Create host/hostgroup and submit - will go to the index page

4. Click on the new host/hostgroup - will go to the new created host/hostgroup

5. Click back - nothing happen - should go back to the index page

6. Click back again - will go to the new host/hostgroup page