Previously the code defined compatiblity usings in `QtOpenGL.h` header,
which I think was added for backwards compatiblity with previous Qt
OpenGL widgets.
As far as I can tell, this is not necessary anymore, and can be cleaned
up.
Every basic data type is stored in Base module, color is standing out as
one that does not. Moving it to Base opens possibilities to integrate it
better with the rest of FreeCAD.
* [Gui] fix the FPS text visibilty issues
* [Gui] code efficiency based on suggestions
* [Gui] update color parameter
* [Gui] Fix Lint feedback
* [Gui] check if string is empty
* add CMake definitions 'QT_NO_KEYWORDS' to avoid the Qt definition of the 'slots' macro that causes a conflict when including Python headers
* drop QT3_SUPPORT define
When an event type is `QEvent::Wheel`, the event type is `QWheelEvent`,
which is not a `QMouseEvent`. This caused a undefined behavior that can
be cached by ubsan.
* QString::indexOf() is now marked as [[nodiscard]]
* Replace deprecated methods of QMessageBox
* QMouseEvent::globalPos() is deprecated, use globalPosition().toPoint()
* QWidget::enterEvent() requires a QEnterEvent as argument
* QLibraryInfo::location() is deprecated, use path()
* QVariant::Type is deprecated, use QMetaType::Type
* QVariant::canConvert(int) is deprecated, use QVariant::canConvert(QMetaType) or QVariant::canConvert<T>()
* QMessageBox::standardIcon is deprecated, use QStyle::standardIcon()
* Replace deprecated method QMessageBox::question(), ...
* QApplication::fontMetrics() is deprecated
* QDropEvent::mouseButtons() is deprecated, use buttons()
* QDropEvent::keyboardModifiers() is deprecated, use modifiers()
* Constructor of QFontDatabase is deprecated, use static methods instead
* Qt::AA_DisableHighDpiScaling is deprecated
* Qt::AA_EnableHighDpiScaling is deprecated
* Qt::AA_UseHighDpiPixmaps is deprecated
* Explicitly include some missing headers
* Use 'static const char*' for XPM icon
* Skip template parameters for qMakePair
* Constructor of QFileInfo is marked as 'explicit' now
* QString::fromLatin1() also accepts a QByteArray
* QDateTime::fromTime_t() is deprecated in Qt5 and has been removed in Qt6. Use QDateTime::fromSecsSinceEpoch()
* QDateTime::toTime_t() is deprecated in Qt5 and has been removed in Qt6. Use QDateTime::toSecsSinceEpoch()
* QApplication::globalStrut() is deprecated. Don't use it any more.
* QWidget::isTopLevel() is deprecated, use QWidget::isWindow()
* Q_PROPERTY should have either NOTIFY or CONSTANT [-Wclazy-qproperty-without-notify]
* Use Q_ENUM instead of Q_ENUMS [-Wclazy-qenums]
* Add missing a Q_OBJECT macro [-Wclazy-missing-qobject-macro]
* Signal/Slot arguments need to be fully-qualified [-Wclazy-fully-qualified-moc-types]
