Consider findWorstWarningBetween for branches of running builds

[stuartrowe]

Testing done

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• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
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[felipecrs]

@dwnusbaum I understand you recommended to copy this plugin's functionality into Pipeline Graph View given it's no longer being actively maintained.

But I would like to pose a strong support for this PR to be merged here and not just into some Pipeline Graph View copy because this issue also affects Blue Ocean and fixing it would be of tremendous value (at least for me and users of my Jenkins instance).

I understand Blue Ocean itself is "deprecated" too, but realistically it is still working, and a lot of people are using it.

Hope you are ok with it. :)

[felipecrs]

Thanks a lot, @stuartrowe. I can confirm this fixed the bug in Blue Ocean too. Thanks @timja for the new release!