[FOLLOWUP][FEATURE] Introduce System Information dropdown item

* Align status constants to FlashMessages and Modals
* Add additional badge-info class
* Display non-production environments as warning

Resolves: #65767
Releases: master
Change-Id: Ib78860bffcd10b6a623fc498647048794d02bc67
Reviewed-on: http://review.typo3.org/38420


Reviewed-by: Jigal van Hemert <jigal.van.hemert@typo3.org>
Tested-by: Jigal van Hemert <jigal.van.hemert@typo3.org>