[BUG] menubar example background doesn't refresh if not focussed

[lesleyrs]

Describe the bug When pressing esc to focus the menubar the bg doesn't refresh after resizing screen.

To Reproduce crossterm backend

Expected behavior Expected it to refresh when resizing the screen

Screenshots

Environment

• Windows 10
• Crossterm backend 30046dc563b3041092f0f0475ddf87a84eef25f9

Additional context This might be an inherent limitation? Only tried the examples.

[unclev]

The same with

Environment

• Linux (OpenSUSE Tumbelweed)
• ncurses backend

Additional context Alacritty terminal. (Reproduced not in the example, but in my app being developed).