add navbar to coming soon page,

Relates #148

src/components/Pages/ComingSoon.js

@@ -1,26 +1,18 @@
 /* eslint-disable class-methods-use-this */
 
 import React from "react";
-import BackButton from "../TopBar/BackButton";
+import NavBar from "../Navbar/Navbar";
 import comingSoonIcon from "../../assets/icons/coming-soon-icon.svg";
-import PropTypes from "prop-types";
 
 export default class ComingSoon extends React.Component {
   render() {
     return (
       <React.Fragment>
-        <div id="topbar-container">
-          <BackButton link={this.props.link} />
-          <h3 id="topbar-title">Coming soon...</h3>
-        </div>
         <div id="icon-wrapper">
           <img id="coming-soon-icon" src={comingSoonIcon} />
         </div>
+        <NavBar />
       </React.Fragment>
     );
   }
 }
-
-ComingSoon.propTypes = {
-  link: PropTypes.string
-};

src/components/Pages/Statistics.js

@@ -8,7 +8,6 @@ export default class StatisticsPage extends React.Component {
     return (
       <div>
         <ComingSoon />
-        <Navbar />
       </div>
     );
   }