RFR: 8264795: IGV: Upgrade NetBeans platform [v2]

[Roberto Castañeda Lozano]

On Fri, 9 Apr 2021 23:07:39 GMT, Xin Liu <xliu at openjdk.org> wrote:

> Thank you for modernizing IGV. I manage to import this project to IntelliJ. The process is hassle-free!
> 
> I also ran using jdk8/jdk11 on macOS. I haven't identified any problem so far.

Thanks for checking, Xin!

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PR: https://git.openjdk.java.net/jdk/pull/3361