Fix button error

app/gabsocial/components/button.js

@@ -22,10 +22,10 @@ export default class Button extends React.PureComponent {
 
   static defaultProps = {
     size: 36,
-  };
+  }
 
   handleClick = (e) => {
-    if (!this.props.disabled) {
+    if (!this.props.disabled && this.props.onClick) {
       this.props.onClick(e);
     }
   }