Implement an option to display an indicator on Target Bar to show when you are locked on

[AzrielltheWise]

Like others, I prefer to place HXUI's Party List over the existing UI's Party List. I then reduce the Target Bar's X-axis and place the diminished Target Bar above the Party List, to emulate the original UI layout. This works great for me, but I can no longer tell when I am locked on to a mob when this setup. It would be great if this feature could be added.

Thanks for the great work :)