[web] annoying react warning

[willdurand]

I always get this:

Warning: Unknown prop `onKeyboardFocus` on <div> tag. Remove this prop from the element. For details, see https://fb.me/react-unknown-prop
    in div (created by Avatar)
    in Avatar (at presenter.js:119)
    in div (created by IconMenu)
    in IconMenu (at presenter.js:116)
    in div (at presenter.js:102)
    in Auth (created by Connect(Auth))
    in Connect(Auth) (at presenter.js:16)
    in div (created by AppBar)
    in div (created by Paper)
    in Paper (created by AppBar)
    in AppBar (at presenter.js:14)
    in div (at presenter.js:13)
    in App (at index.js:42)
    in Router (created by BrowserRouter)
    in BrowserRouter (at index.js:41)
    in Provider (at index.js:40)
    in MuiThemeProvider (at index.js:39)

[willdurand]

cf. mui/material-ui#6703