Have main and listSystems working

frontend/src/System/ListSystems.js

@@ -0,0 +1,49 @@
+import React, { Component } from "react";
+import { Link } from 'react-router-dom'
+import SystemCard from "./SystemCard";
+import {
+  Container,
+  Header,
+  Card,
+  Icon,
+  Menu,
+  Divider
+} from "semantic-ui-react";
+
+
+// ----------------------------------------------------
+class ListSystems extends Component {
+
+  state = {
+    requestMessage: "",
+  }
+  
+  componentDidMount() {
+  		this.props.fetchSystems();
+  	}
+
+//https://stackoverflow.com/questions/36559661/how-can-i-dispatch-from-child-components-in-react-redux
+//https://stackoverflow.com/questions/42597602/react-onclick-pass-event-with-parameter
+  render() {
+    const systems = this.props.system.items;
+    return (
+      <div>
+        <Menu fixed="top">
+          <Link to="/"><Menu.Item link><Icon name='arrow left' /> Home</Menu.Item></Link>
+          <Link to="/about"><Menu.Item link>About</Menu.Item></Link>
+        </Menu>
+        <Container >
+          <Divider horizontal style={{paddingTop:"5em", paddingBottom:"2em"}}><Header as="h1">Radio Systems<Icon name='rss' /></Header></Divider>
+          <Card.Group itemsPerRow={4} stackable={true}>
+          {systems.map((system) =>
+            system.active&&<SystemCard system={system} key={system.shortName} onClick={(e) => this.props.changeUrl("/system/" + system.shortName)}/>
+            // <SystemCard system={system} key={system.shortName} onClick={(e) => this.props.changeUrl("/system/" + system.shortName)}/>
+         )}
+          </Card.Group>
+        </Container>
+      </div>
+    );
+  }
+}
+
+export default ListSystems;