RFR: 8278860: Streamline properties for Monocle [v2]

[Kevin Rushforth]

On Fri, 17 Dec 2021 13:54:10 GMT, Johan Vos <jvos at openjdk.org> wrote:

>> Base decisions in prism for embedded cases on the same glass.platform property that is also used in glass.
>> This PR replaces the property `embedded` with the property `glass.platform` .
>> 
>> There is only 1 place where the property `embedded` was read, which is in the PlatformUtil.java.
>> 
>> There are only 2 places where the value of that property is used, and in both cases the only check is to detect whether or not that property has a value of "monocle".
>
> Johan Vos has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add space after comma

Marked as reviewed by kcr (Lead).

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PR: https://git.openjdk.java.net/jfx/pull/696