[Glitch] Run eslint --fix

I don't like it changing files this way, but it's basically what
c49213f0ea and a few others did.

app/javascript/flavours/glitch/features/ui/components/column_header.js

@@ -15,7 +15,7 @@ export default class ColumnHeader extends React.PureComponent {
 
   handleClick = () => {
     this.props.onClick();
-  }
+  };
 
   render () {
     const { icon, type, active, columnHeaderId } = this.props;