Restore closure inspector-related parts of console/completion/4233 test

41ec329ac54ee04f4 made them work again.
Enable commandLine/5873 test

While it currently fails, it shouldn't (issue 6842 is fixed).
Issue 7185: Command line input text gets darker when there is an auto-completion

https://code.google.com/p/fbug/issues/detail?id=7185