RFR: JDK-8298060: Fix precision bug in gesture recognizer classes

[Kevin Rushforth]

On Sat, 3 Dec 2022 22:17:55 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> This includes a fix for the precision problem we've found as part of the graphics warnings clean ups.
> 
> I've included two commits, one with just the minimal fix, and one with the clean ups. I can drop off the 2nd commit if it is deemed to be of no added value.

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PR: https://git.openjdk.org/jfx/pull/966