add warning when peer's messaging is disabled

src/widgets/more-button.jsx

@@ -13,7 +13,7 @@ export default class MoreButton extends React.PureComponent {
   }
 
   handleToggle() {
-    let open = !this.state.open;
+    const open = !this.state.open;
     this.setState({open: open});
     if (this.props.onToggle) {
       this.props.onToggle(open);
@@ -21,7 +21,7 @@ export default class MoreButton extends React.PureComponent {
   }
 
   render() {
-    return (<label className="small" onClick={this.handleToggle}>{this.props.title}...
+    return (<label className="small clean-clickable" onClick={this.handleToggle}>{this.props.title}...
       {this.state.open ? <i className="material-icons">expand_more</i> :
         <i className="material-icons">chevron_right</i>}
       </label>);