[Rev 04] RFR: 8244112: Skin implementations: must not violate contract of dispose

[Ajit Ghaisas]

On Thu, 14 May 2020 10:11:16 GMT, Jeanette Winzenburg <fastegal at openjdk.org> wrote:

>> some skins have not been guarding themselves against multiple calls to dispose (see issue for details)
>> 
>> Fixed by backing out off dispose if skinnable is null. Added test (parameterized in control class) for all controls in
>> the controls package. Those that failed for the misbehaving skins before are passing after the fix.
>
> Jeanette Winzenburg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   renamed misnamed local field

Marked as reviewed by aghaisas (Reviewer).

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PR: https://git.openjdk.java.net/jfx/pull/209