RFR: JDK-8321984: IGV: Upgrade to Netbeans Platform 20 [v6]

[Tobias Holenstein]

On Mon, 22 Jan 2024 12:15:24 GMT, Roberto Castañeda Lozano <rcastanedalo at openjdk.org> wrote:

>> Tobias Holenstein has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Revert "make IGV build work with mainline JDK version"
>>   
>>   This reverts commit 35080de727135741fee96834470072f002c32501.
>
> Thanks Toby, looks good!

Thanks @robcasloz and @chhagedorn for the reviews!

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PR Comment: https://git.openjdk.org/jdk/pull/17106#issuecomment-1903885497