RFR: 8380: Support dark mode in graphs

[Marcus Hirt]

Also added dark mode support in the Automated Analysis page, and fixed wrong version in a few properties files along the way. 

Added a simple debug console for the next person needing to do something in the Automated Analysis page. I can't wait for the IE based WebView used by default by the SWT Browser component on Windows to die a well deserved death...

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Commit messages:
 - Dark mode Analysis Overview plus version fixes
 - Quality of life...
 - Spotless and checkstyle
 - 8380: Fixing dark mode for graphs

Changes: https://git.openjdk.org/jmc/pull/639/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=639&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8380
  Stats: 385 lines in 19 files changed: 332 ins; 4 del; 49 mod
  Patch: https://git.openjdk.org/jmc/pull/639.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/639/head:pull/639

PR: https://git.openjdk.org/jmc/pull/639