RFR: 8273349: Check uses of Stream::peek in controls and replace as needed

[Kevin Rushforth]

On Sun, 24 Mar 2024 15:10:22 GMT, drmarmac <duke at openjdk.org> wrote:

> This PR removes potentially incorrect usages of Stream.peek().
> The changed code should be covered by the tests that are already present.

Reviewers: @andy-goryachev-oracle @karthikpandelu

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PR Comment: https://git.openjdk.org/jfx/pull/1430#issuecomment-2018647835