RFR: JDK-8305885: Use ReadOnly*PropertyBase class where possible [v2]

[John Hendrikx]

On Sat, 15 Apr 2023 00:04:03 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> John Hendrikx 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:
>> 
>>   Use property base classes where possible
>
> Looks like a fairly straight-forward change. Are there any memory implications? I wouldn't think so, but it's worth checking.

@kevinrushforth There aren't any memory implications, `ReadOnlyPropertyBase` does not add additional fields (beyond the `ExpressionHelper` field).

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PR Comment: https://git.openjdk.org/jfx/pull/1092#issuecomment-1509436007