message: Update picked pixel values when changing overlays
  * This accounts for e.g. quad overdraw where the picked pixel value is
  affected.
diff: @@ -2908,6 +2908,10 @@ void TextureViewer::on_overlay_currentIndexChanged(int index)
  m_TexDisplay.overlay = (DebugOverlay)ui->overlay->currentIndex();
  INVOKE_MEMFN(RT_UpdateAndDisplay);
  + if(m_Output != NULL && m_PickedPoint.x() >= 0 && m_PickedPoint.y() >= 0)
  + {
  + INVOKE_MEMFN(RT_PickPixelsAndUpdate);
  + }
  }
  void TextureViewer::channelsWidget_mouseClicked(QMouseEvent *event)
  