Prioritize and display -testsafemode status in UI

Like in a real world situation, a safe mode test should also be visible in the
UI. A test of safe mode is furthermore mostly relevant for developers, so it
should not be overwritten by a warning about a pre-release test build.
I actually think it should _not_ be translated.  Translating it will break software which is attempting to use it. This field is not generally for human reading, but e.g. automatic tests of your alterting infrastructure would happily key on the specific text.