RFR: 6542: Improve calls to render in the flame view [v21]

[Miroslav Wengner]

> stable flameview generation

Miroslav Wengner 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 35 additional commits since
the last revision:

 - Merge branch 'master' of https://github.com/openjdk/jmc into feature/6542_Improve_calls_to_render_in_the_flame_view
 - 6542: revert TraceNode - add missing bracket
 - 6542: more cleanup
 - 6542: clean up
 - 6542: cleanup unsused abstractions
 - 6542: correction, to speed up
 - 6542: checkstyle
 - 6542: code clean up
 - 6542: small correction
 - 6542: cleanup improvements
 - ... and 25 more: https://git.openjdk.java.net/jmc/compare/f30b6601...70ba9b4b

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

Changes:
  - all: https://git.openjdk.java.net/jmc/pull/78/files
  - new: https://git.openjdk.java.net/jmc/pull/78/files/0a72a815..70ba9b4b

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=78&range=20
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=78&range=19-20

  Stats: 3683 lines in 133 files changed: 1746 ins; 336 del; 1601 mod
  Patch: https://git.openjdk.java.net/jmc/pull/78.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/78/head:pull/78

PR: https://git.openjdk.java.net/jmc/pull/78