[jfx19] RFR: 8286678: Fix mistakes in FX API docs [v4]

[Nir Lisker]

On Tue, 23 Aug 2022 15:36:35 GMT, Nir Lisker <nlisker at openjdk.org> wrote:

>> Fixes the mistakes in the JBS ticket and some additional minor corrections.
>
> Nir Lisker has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Addressed review comments

When looking at `Service` I noticed that in `Worker` the property docs are on the  `get` methods instead of on the `property` methods: https://openjfx.io/javadoc/18/javafx.graphics/javafx/concurrent/Worker.html#getState()

This causes `Service` to inherit these as well. Docs should only appear on the property (except in special circumstances), but I didn't want to touch all of this here. Should I create a new issue for this or is it not worth it?

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PR: https://git.openjdk.org/jfx/pull/880