Added themable header, footer and navbar

src/app/navbar/themed-navbar.component.ts

@@ -0,0 +1,25 @@
+import { Component } from '@angular/core';
+import { ThemedComponent } from '../shared/theme-support/themed.component';
+import { NavbarComponent } from './navbar.component';
+
+/**
+ * Themed wrapper for NavbarComponent
+ */
+@Component({
+  selector: 'ds-themed-navbar',
+  styleUrls: [],
+  templateUrl: '../shared/theme-support/themed.component.html',
+})
+export class ThemedNavbarComponent  extends ThemedComponent<NavbarComponent> {
+  protected getComponentName(): string {
+    return 'NavbarComponent';
+  }
+
+  protected importThemedComponent(themeName: string): Promise<any> {
+    return import(`../../themes/${themeName}/app/navbar/navbar.component`);
+  }
+
+  protected importUnthemedComponent(): Promise<any> {
+    return import(`./navbar.component`);
+  }
+}