Add numeric chart panel

app/src/components/Tree/Tree.tsx

@@ -107,6 +107,10 @@ class TreeComponent extends React.PureComponent<Props, State> {
     const style: React.CSSProperties = {
       lineHeight: '1.1',
       cursor: 'default',
+      overflowY: 'scroll',
+      overflowX: 'hidden',
+      height: '100%',
+      paddingBottom: '16px', // avoid conflict with chart panel Resizer
     }
 
     return (