message: Don't display pixel context right-click context menu if no log is loaded
  * This fixes an uploaded crash, where this context menu could launch
  operations that crash without a capture to work on.
diff: @@ -2962,6 +2962,9 @@ private void pixelContext_MouseClick(object sender, MouseEventArgs e)
  {
  pixelContext.Focus();
  + if (!m_Core.LogLoaded)
  + return;
  +
  if (e.Button == MouseButtons.Right)
  {
  pixelContextMenu.Show(pixelContext, e.Location);
  