RFR: 8259009: G1 heap summary should be shown in "Heap Parameters" window on HSDB

[Yasumasa Suenaga]

G1 heap summary (G1 Heap, summaries for each spaces) is shown on console even though I chosen "Heap Parameters" menu on HSDB. It should be shown on "Heap Parameters" window on HSDB.

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Commit messages:
 - G1 heap summary should be shown in "Heap Parameters" window on HSDB

Changes: https://git.openjdk.java.net/jdk/pull/1911/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1911&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259009
  Stats: 31 lines in 2 files changed: 14 ins; 1 del; 16 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1911.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1911/head:pull/1911

PR: https://git.openjdk.java.net/jdk/pull/1911