The feature was presented as customising "the ComfyUI Logo", so people
expected the logo at the top left of the interface to change. It only
ever replaced link[rel=icon], the browser tab icon. That logo is an
inline SVG rendered by the frontend and is not something this setting
touches.
Rename the setting, its category and the README section accordingly, and
say in the tooltips that the interface logo is unaffected. No behaviour
change.
Also drops a duplicate KayTool_EnableCustomWebLogo key that the previous
commit left in every locale file.