Prevent log window buffer from filling up (Closes #929673)

src/loglistwidget.cpp

@@ -64,7 +64,7 @@ void LogListWidget::keyPressEvent(QKeyEvent *event)
 
 void LogListWidget::appendLine(const QString &line)
 {
-  QListWidgetItem *item = new QListWidgetItem(this);
+  QListWidgetItem *item = new QListWidgetItem;
   // We need to use QLabel here to support rich text
   QLabel *lbl = new QLabel(line);
   lbl->setContentsMargins(4, 2, 4, 2);