Fixed toolbar selection

src/app/components/toolbar/toolbar.component.scss

@@ -0,0 +1,3 @@
+.selected {
+  background-color: rgba(70, 70, 70, 0.8);
+}

src/app/components/toolbar/toolbar.component.ts

@@ -5,6 +5,7 @@ import {version} from '../../../../package.json';
 @Component({
     selector: 'toolbar',
     templateUrl: 'toolbar.component.html',
+    styleUrls: ['toolbar.component.scss']
 })
 export class ToolbarComponent implements OnInit, AfterViewInit {
     @Input() menuItems: ToolbarItem[];