Window and Widgets are scaled inproperly when per-monitor-dpi awareness is set and application is moved between 1080p/4k monitors

When having per-monitor-dpi awareness set on (-platform windows:dpiawareness=2), moving the application window between 1080p and 4k monitors scale the window strangely. Part of the problem may be if the widget has max width set, it does not get scaled properly.

Steps to reproduce:

• Run "Config Dialog" Qt Example with "QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);" added.
• Have the application pop up on 1080 screen initially
• Move the application to 4k screen
• Observe list widget not scaling properly because it has max width set
• Move application back to 1080 screen
• EXPECTED: All scaling works fine, application ends up looking the same as it was initially
• ACTUAL: Application's window size has doubled, scaling in 4k screen seems somewhat broken