Fix upgrade detection

src/App.js

@@ -690,7 +690,7 @@ class App extends Component {
                   textAlign={'center'}
                   type={'Heading1'}/>
             <UpgradeIcon
-              available={!this.state.UpgradeAvailable}
+              available={this.state.UpgradeAvailable}
               clicked={()=>this.setState({UpgradeDismissed: false})}
               col={dimensions => dimensions.columns - 7}
               colSpan={6}