Windows renders the application image on top so it appears twice.
Update example file thumbnails on start page to have a consistent background (classic theme) and remove the old FreeCAD logos.
When saving the thumbnail there is a check if the 3D window is the active window. This check fails if a document is saved for the first time because
the appearing file dialog causes the 3D window to not be active any more. Thus, no snapshot of the 3D window will be created and the program logo will be
saved instead. A workaround is to save the document twice.
This PR removes the check for the active window so that the snapshot can be created. The issue might be related to #10937.
* [macOS] Adding QuickLook feature
* [macOS] Adding QuickLook support for Conda and Homebrew.
* [macOS] Support non-square app icons in thumbnails.
* [macOS] adding icon for .FCScript files
* QApplication::setFallbackSessionManagementEnabled has been removed
* QString::medRef() has been removed. Use QString::mid() again.
* QTextStream::setCodec has been removed
* Use operator QVariant of the QFont class to make code Qt5 and Qt6 compatible
* Signature of QTreeWidget::mimeData() has changed in Qt6. Remove TreeWidget::mimeData() because it doesn't change the implementation
* QLayout::setMargin() is deprecated in Qt5 and has been removed in Qt6. Use QLayout::setContentsMargins()
* QDateTime::toTime_t() is deprecated in Qt5 and has been removed in Qt6. Use QDateTime::toSecsSinceEpoch()
* QDesktopWidget is deprecated in Qt5 and has been removed in Qt6. Use QScreen
avoid to crash the application when trying to create thumbnail from worker thread
avoid that application behaves weirdly when triggering an action update from worker thread
