Quick tab pop out window becomes a ghost window.

1. Launch Mission Planner.
2. Right click on Quick tab and select Undock. The pop out window appears.
3. Return to main Mission Planner window and click in sequence the menu strip buttons, i.e., PLAN, SETUP, CONFIG, etc. Eventually the pop out Quick window goes completely blank and becomes a ghost window.
4. Click on the DATA tool strip button to return to Flight Data screen.
5. Close the (now) Quick ghost pop out window.
6. The Quick tab goes completely blank and becomes a ghost tab as well.

Reproduce the issue in Mission Planner by undocking the Quick tab, switching between PLAN, SETUP, CONFIG and DATA, and closing the blank pop-out. Trace the Quick tab undocking and desktop navigation handling; done means the pop-out and remaining Quick tab stay rendered and usable throughout these steps.

Written by the indexing model from the issue text.