The only thing I've ever used the log window for is obtaining tracebacks from users without them having to run Picard from a terminal. In general, non-developers aren't using these messages for anything except reporting bugs. So the messages still have to be useful for developers, because they're the ones fixing the bugs. I don't think we should appropriate this dialog for everyday users.

The status bar idea sounds interesting, but it should be something entirely separate from the log window (and more visible - in my experience, most users on the forum don't know that the log window exists, let alone what it's for).

Anyway, what I wrote above is moot here. Since ```currentThreadId``` doesn't appear to be useful, I would just remove it from the stderr receiver as well.