[code-reflection] Integrated: Add back code for highlighting SSA id references

[Gary Frost]

Add back the code for highlighting ssaid refences to and from the current line.

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Commit messages:
 - Add back code for highlighting SSA id references

Changes: https://git.openjdk.org/babylon/pull/505/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=505&range=00
  Stats: 147 lines in 3 files changed: 65 ins; 67 del; 15 mod
  Patch: https://git.openjdk.org/babylon/pull/505.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/505/head:pull/505

PR: https://git.openjdk.org/babylon/pull/505