Layout changes

src/App.js

@@ -684,7 +684,7 @@ class App extends Component {
       let key = 0;
       mainContent.push((
         <div key={'rvd_' + key++}
-             style={{height: '34%'}}>
+             style={{height: '25%'}}>
           <ReleaseVersionDisplay disabled={this.state.DownloadActive || this.state.ExtractActive || this.state.MountsBusy}
                                  downloadClicked={this.handleReleaseDownload}
                                  downloadDisabled={!downloadEnabled}