Fixing miscellaneous rendering issues to make the WindowsVista
style look good on High DPI displays:
- Fixed size/resolution of combo box arrows, and changed to native look.
- Fixed vanishing horizontal line in the frame of line edit widgets.
- Fixed gaps in combo box popup.
- Fixed size/resolution of arrow in push button menu.
Task-number: QTBUG-49374
Task-number: QTBUG-65237
Task-number: QTBUG-65238
Change-Id: If68c2fae7472def3c19636483af741ca8ed2c490
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
5c60e4b8f9