RFR: 8274: Add thread counts to the Java Application page [v3]

[Marcus Hirt]

> Added all of them, but perhaps only having active and daemon would be good enough.

Marcus Hirt has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - Merge branch '8274-thread-counts' of https://github.com/thegreystone/jmc into 8274-thread-counts
 - Localization and non-filled line graphs
 - 8274: Adding thread counts to the Java Application page
 - Localization and non-filled line graphs
 - 8274: Adding thread counts to the Java Application page

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

Changes:
  - all: https://git.openjdk.org/jmc/pull/600/files
  - new: https://git.openjdk.org/jmc/pull/600/files/d8806ea1..be4212fb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=600&range=02
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=600&range=01-02

  Stats: 9265 lines in 53 files changed: 1851 ins; 6398 del; 1016 mod
  Patch: https://git.openjdk.org/jmc/pull/600.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/600/head:pull/600

PR: https://git.openjdk.org/jmc/pull/600