head_job.err as ansi result

[jsmedmar]

Should we update the type of head_job.err to ansi? isabl_cli/app.py#L131

In favor of In favor of the web https://github.com/isabl-io/web/pull/74

[jsmedmar]

A few thoughts here:

• We should set both head_job.err and head_job.log to ansi by default in the frontend directly. This will ensure backwards compatibility.
• If you want to get ansi logs, you have to run head_job.sh with unbuffer. At this point both stdout and stderr get combined and it doesn't make sense anymore to keep head_job.err, but just something like Analysis Logs. So we may want to add a setting that enables the user to hide the head_job.err chip.