[jfx19] RFR: 8286678: Fix mistakes in FX API docs [v3]

[Nir Lisker]

On Thu, 18 Aug 2022 23:43:33 GMT, Nir Lisker <nlisker at openjdk.org> wrote:

>> Fixes the mistakes in the JBS ticket and some additional minor corrections.
>
> Nir Lisker has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
> 
>   Initial commit

#880 is the new PR.

-------------

PR: https://git.openjdk.org/jfx/pull/877