[code-reflection] Integrated: Updates to healing brush demo conversion to hat - ongoing

[Gary Frost]

Ongoing updates to healing brush demo. In preparation for conversion to using HAT

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Commit messages:
 - Updates to healing brush demo conversion to hat - ongoing
 - Updates to healing brush demo conversion to hat - ongoing

Changes: https://git.openjdk.org/babylon/pull/113/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=113&range=00
  Stats: 259 lines in 7 files changed: 94 ins; 69 del; 96 mod
  Patch: https://git.openjdk.org/babylon/pull/113.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/113/head:pull/113

PR: https://git.openjdk.org/babylon/pull/113