Describe the bug
When using an icon from the 'Action' section from Material Icons the _ is interpreted as a space and the icon is not shown.

Codepen/jsFiddle/Codesandbox (required)
https://codepen.io/Evertvdw/pen/WNrbQBo

Expected behavior
I expect the right icon to show.
https://material.io/resources/icons/?search=filter&icon=filter_alt&style=baseline

Screenshots
If applicable, add screenshots to help explain your problem.

Platform (please complete the following information):
Browsers: Chrome