In https://github.com/bbidulock/icewm/issues/398#issuecomment-554676714 he says there is no way to unbind keys.
- Bug#944414: SHIFT+ESC conflict's with chromium's ta... 積丹尼 Dan Jacobson
- Bug#944414: SHIFT+ESC conflict's with chromium... Eduard Bloch
- Bug#944414: SHIFT+ESC conflict's with chro... 積丹尼 Dan Jacobson
- Bug#944414: no way to unbind keys 積丹尼 Dan Jacobson
- Bug#944414: marked as done (SHIFT+ESC conflict... Eduard Bloch
