// use a SingleColorIcon for the "out of sync warning" icon
QIconicon=SingleColorIcon(":/icons/warning");
icon.addPixmap(icon.pixmap(QSize(64,64),QIcon::Normal),QIcon::Disabled);// also set the disabled icon because we are using a disabled QPushButton to work around missing HiDPI support of QLabel (https://bugreports.qt.io/browse/QTBUG-42503)