feat(extension-cornerstone): Add additional tools: Magnify, ROI Window, Probe, Ellipse, Rectangle, Invert, Rotate Right, Flip H, Flip V, Clear

src/connectedComponents/ToolbarRow.js

@@ -1,11 +1,7 @@
 import './ToolbarRow.css';
 
 import React, { Component } from 'react';
-import {
-  RoundedButtonGroup,
-  ToolbarButton,
-  ExpandableToolMenu,
-} from 'react-viewerbase';
+import { ExpandableToolMenu, RoundedButtonGroup, ToolbarButton } from 'react-viewerbase';
 import { commandsManager, extensionManager } from './../App.js';
 
 import ConnectedCineDialog from './ConnectedCineDialog';
@@ -155,7 +151,7 @@ class ToolbarRow extends Component {
  */
 function _getButtonComponents(toolbarButtons, activeButtons) {
   return toolbarButtons.map((button, index) => {
-    if (button.buttons) {
+    if (button.buttons && button.buttons.length) {
       // Iterate over button definitions and update `onClick` behavior
       const childButtons = button.buttons.map(childButton => {
         childButton.onClick = _handleToolbarButtonClick.bind(this, childButton);
@@ -171,7 +167,6 @@ function _getButtonComponents(toolbarButtons, activeButtons) {
         />
       );
     }
-
     return (
       <ToolbarButton
         key={button.id}