Allow admin mode to be toggled.
For users with admin privileges they currently see all hosts all of the time.
Given that 95% of time I am working as a non admin it would be good if I could toggle my own
admin privs on and off with a checkbox so that when I use the foreman interface most of the time
I am just like a "normal" user and only see my hosts for instance. It also offers some limited protection
agains me accidentally deleting everybody elses hosts.