JDK-8295813: misc client tests failing on Windows_11_Pro

[honkar-jdk]

ViewportOverlapping test was failing intermittently on Windows_11_Pro. The test has been updated to run at uiScale=1 to position the mouse clicks at correct locations and the deprecated InputEvent.BUTTON1_MASK is replaced with BUTTON1_DOWN_MASK.

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Issue

• JDK-8295813: misc client tests failing on Windows_11_Pro

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[mlbridge]

Webrevs

• 00: Full (9c6bbe80)

[mrserb]

What is changed in Windows 11 that the test fails on the HiDPI monitor?

[honkar-jdk]

What is changed in Windows 11 that the test fails on the HiDPI monitor?

@mrserb Earlier I thought the intermittent issue might be due to wrong color being picked up or incorrect click location by Robot at the edges of component (in HiDPI). But it seems to be happening only when a batch of AWT_Mixing tests are run on Win11. There are couple of more client tests being analyzed as part this bug currently, hence converting this PR into draft until further updates.