RFR: JDK-8305885: Use ReadOnly*PropertyBase class where possible [v4]

Tue Apr 18 21:27:03 UTC 2023

On Mon, 17 Apr 2023 07:23:40 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

>> These changes use base classes for custom properties where possible for the `ExpressionHelper` logic instead of duplicating these each time.
>
> John Hendrikx has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix review comment

Marked as reviewed by kcr (Lead).

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

PR Review: https://git.openjdk.org/jfx/pull/1092#pullrequestreview-1390957282