Fix spelling of global_logout_label default in active_sessions feature

[sterlzbd]

Noticed this while adding active_sessions to a project. This seemed minor enough that we don't need to add a spec for it but I can if you think we should!

[jeremyevans]

Thanks for fixing this. I think we should have active_sessions_spec check the box using the label instead of the id as it does currently, as a way of testing this.

[sterlzbd]

Thanks!