RFR: 8269115: WebView paste event contains old data [v4]

[Jay Bhaskar]

On Fri, 25 Feb 2022 07:11:49 GMT, Jay Bhaskar <duke at openjdk.java.net> wrote:

>> Issue: The DataObject uses m_availMimeTypes as Vector of strings, and appending mime types in pasteboard operation like setPlainText, Hence it will append duplicate mime types in m_availMimeTypes , in this case the length clipboardData.types would be wrong, and duplicates data would be copied to clipboard target.
>> Solution: Use ListHashSet data Structure instead of Vector for m_availMimeTypes.
>
> Jay Bhaskar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Test regression according to bug

All , requested changes applied.

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PR: https://git.openjdk.java.net/jfx/pull/729