Update applications list immediately when re-enabling view

Otherwise we potentially show stale data for a brief period.

processcore/cgroup_data_model.cpp

@@ -357,6 +357,7 @@ void CGroupDataModel::setEnabled(bool enabled)
 {
     if (enabled) {
         d->m_updateTimer->start();
+        QMetaObject::invokeMethod(this, [this] {update();}, Qt::QueuedConnection);
     } else {
         d->m_updateTimer->stop();
     }