RFR: JDK-8297031: IGV: Copy extracted nodes and layout for cloned graph

[Tobias Holenstein]

previously in IGV the user could open a graph in a new tab by right clicking on a graph -> "open clone". Unfortunately, this did not open a "real" clone if the graph was already opened in another tab: Neither the extracted nodes nor the chosen layout (sea, block, cfg) were applied to the new tab.

# Solution
1. "open clone" was renamed to "Open in new tab"
<img width="1246" alt="new_tab" src="https://user-images.githubusercontent.com/71546117/218485025-dd6c3ca1-59a0-43b2-ace0-f2f054f68a6c.png">


2. The user can right click a Tab -> "Clone" . This opens a proper clone with the same extracted nodes and the chosen layout
<img width="1036" alt="clone" src="https://user-images.githubusercontent.com/71546117/218485079-c92ab3e0-1daa-49a9-bc08-beeac82a69ba.png">

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Commit messages:
 - copyright year
 - JDK-8297031: IGV: Copy extracted and selected nodes for cloned graph

Changes: https://git.openjdk.org/jdk/pull/12534/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12534&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297031
  Stats: 31 lines in 4 files changed: 24 ins; 2 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/12534.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12534/head:pull/12534

PR: https://git.openjdk.org/jdk/pull/12534