RFR: 8400: Add more show options for JMX Console graphs [v4]

[Marcus Hirt]

> Also cleaning up a little bit. There were some assumptions around the default XY chart that should be put in code etc.

Marcus Hirt has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - More space for Linux, resizable and grabbing existing space
 - Spotless
 - Cleanup. Ensuring that the axis is responsible for bounds.
 - 8400: Add more show options for JMX Console graphs

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Changes: https://git.openjdk.org/jmc/pull/652/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=652&range=03
  Stats: 881 lines in 15 files changed: 699 ins; 55 del; 127 mod
  Patch: https://git.openjdk.org/jmc/pull/652.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/652/head:pull/652

PR: https://git.openjdk.org/jmc/pull/652