Task details not showing in UI

Event.path is deprecated in chrome as of the last update https://chromestatus.com/feature/5726124632965120. This is causing a bug when clicking on a task in the UI. This is also see in safari: #3330. Updating to use composedPath() instead per guidance.

This is compatible with all browsers:
https://developer.mozilla.org/en-US/docs/Web/API/Event/composedPath

ui/src/components/diagram/WorkflowGraph.jsx

@@ -339,7 +339,7 @@ class WorkflowGraph extends React.Component {
   };
 
   handleClick = (e) => {
-    const taskRef = e.path[1].id || e.path[2].id; // could be 2 layers down
+    const taskRef = e.composedPath()[1].id || e.composedPath()[2].id; // could be 2 layers down
     const node = this.graph.node(taskRef);
     if (node.type === "DF_TASK_PLACEHOLDER") {
       if (this.props.onClick) this.props.onClick({ ref: node.firstDfRef });