The fusion styled File and FolderDialog's FolderBreadcrumbBar would grow in width as the number of nested directories in the currentFolder path would grow. The other styles would give it a maximum size, which would limit how much it could grow, but not the fusion style. The FolderBreadcrumbBar's width also affects the entire FileDialog default (implicit) width, which would cause the entire dialog to expand as you'd enter more directores. This was unintuitive, and not something that any other file dialogs do. Let's make the fusion style FileDialog behave like the other FileDialogs. Pick-to: 6.10 Change-Id: Icd67803b6e205ac9224b2561417667b4893a4e87 Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>