RFR: 8287604: Update MarlinFX to 0.9.4.5 [v3]

[Kevin Rushforth]

On Fri, 8 Jul 2022 18:01:25 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> I will merge with my latest marlin code asap = 0.9.4.6 (2 more bugs fixed), low risk (few lines) if you agree.

(but don't change your branch name or would need to create a new PR, which doesn't seem worth it)

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PR: https://git.openjdk.org/jfx/pull/674