RFR: JDK-8202790: DnD test DisposeFrameOnDragTest.java does not clean up

[Phil Race]

On Fri, 22 Apr 2022 19:41:44 GMT, Alisen Chung <achung at openjdk.org> wrote:

> Added a background to the test to prevent the file from dragging onto the desktop and creating an extra file.

InputEvent.BUTTON1_MASK);

could be BUTTON1_DOWN_MASK since you are touching this already.

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PR: https://git.openjdk.java.net/jdk/pull/8370