chore(demos): Add additional icon toggle examples (#94)
chore(demos): Add additional icon toggle examples (#94)

Minor cleanups and fixes as well

[ci skip]
material-components/material-components-web,pgbross/material-components-web,Yizhachok/material-components-web,material-components/material-components-web,anton-kachurin/material-components-web,Yizhachok/material-components-web,anton-kachurin/material-components-web,material-components/material-components-web,pgbross/material-components-web