Console error when closing image window

[Ulric]

I tried to close an image window by clicking the X in the top right of the image window. This caused a console error and the disappearance of the image window controls. However, the window did not close. I have attached logs.
FGU v4.6.0 test window controls disappears.png

[Moon Wizard]

Thanks for reporting. I've forwarded on to Carl to review.

Regards,
JPG