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Task bar on all virtual desktops is cluttered by always showing all tasks
running regardless of which virtual desktop any task is running in. 

The only setting I found which might control this is
Settings/Window-Mgt/Task-Switch/Filter-windows-by; but it apparently does not
affect the task bar display. (Nothing is found under
Settings/Workspace/Desktop-behavior/Virtual-desktops.... Which is where I had
hoped to find filters for the desktops.

Reproducible: Always

Steps to Reproduce:
1.Open applications in different desktops
2.Taskbar in any virtual desktop displays ALL task running, not just what is
running in the current virtual desktop.

Actual Results:  
Taskbar always display all tasks running in all virtual desktops on the system
regardless of which virtual desktop is current.

Expected Results:  
Taskbar should display only tasks started or moved to the current desktop.

Degrades usefulness of virtual desktops a lot.