- Fixed QGroupBox alignment with other center-aligned widgets.
- Fixed icon indicators in QToolButton.
- Fixed selection issue causing text and icons to shift in QToolButton.
- Fixed QToolButton's menu indicator shifting when pressed.
- Improved indicator look of tabs.
- Improved the borders and highlighting of tabs.
- Better support for outlines in QFrames without redundancy.
- Better testing support.
- More transparent backgrounds for hover events on QtAbstractItemViews.
- Thinner borders, for a better UI experience.
QFrames only highlight an outline when a QAbstractScrollArea isn't a
child on hover events, so it avoids highlighting an area when a child UI
that will have a similar input focus is there.