This is a fork from https://github.com/davist11/Environment-EE-Addon
We modified it to pull the NSM_ENV variable from Config Bootstrap.
Display which environment you are on at all times in the CP so you don't accidentally do something bad on the production environment.
The value of NSM_ENV will be injected into the header of the CP and fixed to the screen as you scroll.
Note: only shown to Super Admins.