Sometimes you want to change a shortcut and you don't know its name. This may be caused by searching for "new layer" instead of "paint layer". Or sometimes you want to reassign a shortcut but you don't know what it does. For example, I don't know what Y does but I don't think I'll use it. I want to change it without going through the warning popup etc... so I can 1/ find it easily 2/ re-affect it to something else instead of just unbinding it.
Maybe typing "Y" or (Y) or whatever (is there a convention for that sort of search?) in the Search box could find an isolated instance of 'Y'.