[REG 5.11.3 -> 5.12] Mouse wheel scrolling not working with PROCESS_DPI_UNAWARE when screen resolution is > 100%

It is not possible to scroll using the mouse wheel in any widget (QTableWidget, QTreeView, ...) in an application built with Qt 5.12.0 running on a display with a resolution set to 125%, 150% or 175% and where PROCESS_DPI_UNAWARE is set.

Attached is a small test project that reproduces the issue. It:

• calls SetProcessDpiAwareness(PROCESS_DPI_UNAWARE); in main.cpp
• display a QTableWidget with 100 rows 

Reproducibility:

• This issue is reproducible with Qt 5.12.0
• Reproducible on Windows 10 with multiple machines

Steps to reproduce:

• Set your screen resolution to 125%, 150% or 175%

• Download the attached sample project NoScrolling NoScrolling.zip
• Compile and run the application
• Try to scroll using the scroll wheel in the QTableWidget

Result: You can't scroll

This issue might be related to QTBUG-67966: Crash when displaying QSystemTrayIcon's contextual menu with PROCESS_DPI_UNAWARE when screen resolution is > 100%