Bug: Alt+F4 doesn’t work if you have a footnote pop-up window open

Alt+F4 should either close Logos (if the Main logos window has the focus) or close the current floating window if such has the focus. But if you have a pop-up footnote window open in the currently active floating window or tab, Alt+F4 does nothing.

Software version: 4.0b Beta 2.
Reported by Rosie Perera.
Forum link: https://logos.vanillacommunities.com/forums/t/10663.aspx
Status: confirmed