RFR: 7902859: Fix a crash with IntelliJ 2020.2 [v2]

[Maurizio Cimadamore]

On Mon, 22 Mar 2021 18:58:56 GMT, Liam Miller-Cushon <cushon at openjdk.org> wrote:

> Thanks!
> 
> I filed the bug, and updated the note and version number in `resources/plugin.xml`.
> 
> > Also, I suspect this fix has some implication when it comes to backward compatibility - currently we state: `<idea-version since-build="162.0"/>`
> 
> I tried downloading 162.0 / 2016.2, the I can still install the new plugin and load the preference pane without an error, so I think this change is backwards compatible. I don't know very much about IntelliJ plugins, though, and I can do more investigation if there's anything you'd recommend verifying? Alternately I can just bump the version in `<idea-version>` if you think everyone using the plugin is likely to be on a more recent version of IntelliJ at this point?

Thanks for trying out on 2016.2 - if the pane showed up, then I think we're ok. At some point yes, we'll need to bump. But we can do that separately.

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PR: https://git.openjdk.java.net/jtreg/pull/5