AG-1053 Tidy react examples, make more idiomatic

src-examples/editorComponentExample/MoodRenderer.jsx

@@ -0,0 +1,27 @@
+import React, {Component} from "react";
+
+export default class MoodRenderer extends Component {
+    constructor(props) {
+        super(props);
+    }
+
+    componentWillMount() {
+        this.setMood(this.props.value)
+    }
+
+    refresh(params) {
+        this.setMood(params.value);
+    }
+
+    setMood(mood) {
+        this.setState({
+            imgForMood: mood === 'Happy' ? 'images/smiley.png' : 'images/smiley-sad.png'
+        })
+    };
+
+    render() {
+        return (
+            <img width="20px" src={this.state.imgForMood}/>
+        );
+    }
+}