message: Fix strange invalid memory access issue
  For some reason, the line in the commit prevented valgrind from properly executing; this must be some internal Qt thing. Things look OK without the label formatting, so we'll go ahead and remove it.
diff: @@ -334,7 +334,6 @@ void CachePlotWidget::updatePlotAxes() {
  QValueAxis* axisX = qobject_cast<QValueAxis*>(m_series->chart()->axes(Qt::Horizontal).first());
  Q_ASSERT(axisY);
  Q_ASSERT(axisX);
  - axisY->setLabelFormat("%.1f ");
  axisY->setTitleText("%");
  int tickInterval = (m_maxY - m_minY) / axisY->tickCount();
  tickInterval = ((tickInterval + 5 - 1) / 5) * 5; // Round to nearest multiple of 5
  