RFR: 6913: Add daemon thread information to the console threads view [v3]

[Guru Hb]

On Mon, 19 Oct 2020 18:12:20 GMT, Jan S. <github.com+924885+jpstotz at openjdk.org> wrote:

>> I had an Java application which did not exit because of a non-daemon thread still running. Therefore I added a column to the treads view that displays if a thread is a daemon thread or not.
>> 
>> oca: has been signed on 2019-01-17 (got positive response from Dalibor Topic on 2019-01-23).
>
> Jan S. has updated the pull request incrementally with one additional commit since the last revision:
> 
>   message text corrected as requested

Looks good to me

-------------

Marked as reviewed by ghb (Reviewer).

PR: https://git.openjdk.java.net/jmc/pull/110