AG-1053 Tidy react examples, make more idiomatic

src-examples/richComponentExample/ClickableRenderer.jsx

@@ -0,0 +1,28 @@
+import React, {Component} from "react";
+
+export default class ClickableRenderer extends Component {
+    constructor(props) {
+        super(props);
+
+        this.state = {
+            cell: {
+                row: this.props.value,
+                col: this.props.colDef.headerName
+            }
+        };
+    }
+
+    clicked = () => {
+        console.log("Child Cell Clicked: " + JSON.stringify(this.state.cell));
+    };
+
+    render() {
+        let buttonStyle = {
+            lineHeight: 0.5,
+            width: "98%"
+        };
+          return (
+            <button style={buttonStyle} onClick={this.clicked} className="btn btn-info">Click Me</button>
+        );
+    }
+}