Icons are loaded using [@svgr/webpack](https://www.npmjs.com/package/@svgr/webpack). This is configured in [element-web](https://github.com/vector-im/element-web/blob/develop/webpack.config.js#L458)
Each .svg exports a `ReactComponent` at the named export `Icon`.
Icons have `role="presentation"` and `aria-hidden` automatically applied. These can be overriden by passing props to the icon component.