KFilePreviewGenerator: fix signal connections
Due to the scaffolding code in KAbstractItemView, pauseIconUpdates() needs to be still used with SLOT(), add Q_PRIVATE_SLOT() back for it.
Use lambdas with QMetaObject::invokeMethod().
Due to the scaffolding code in KAbstractItemView, pauseIconUpdates() needs to be still used with SLOT(), add Q_PRIVATE_SLOT() back for it.
Use lambdas with QMetaObject::invokeMethod().