feat(ui-features): add the tabs component

src/app/@theme/components/header/header.component.ts

@@ -11,8 +11,9 @@ import { NgaThemeService } from '@nga/theme/services/theme.service';
       <i class="control-icon ion ion-navicon" (click)="toggleSidebar()"></i>
       <span class="logo" (click)="goToHome()">NgX&nbsp;<a>Admin</a></span>
       <button (click)="switchTheme()">Switch Theme!</button>
+      <button (click)="selectDefaultTheme()">Default Theme!</button>
     </div>
-    
+
     <nga-actions size="medium" inverse class="right">
       <nga-action><ngx-search-input></ngx-search-input></nga-action>
       <nga-action icon="ion-ios-email-outline"></nga-action>
@@ -55,4 +56,8 @@ export class HeaderComponent {
       this.themeService.changeTheme('light');
     }
   }
+
+  selectDefaultTheme() {
+    this.themeService.changeTheme('default');
+  }
 }

src/app/@theme/styles/cosmic/cosmic.theme.scss

@@ -3,6 +3,7 @@
  * Copyright Akveo. All Rights Reserved.
  * Licensed under the MIT License. See License.txt in the project root for license information.
  */
+
 @import '../components';
 @import 'variables';
 

src/app/@theme/styles/default/default.theme.scss

@@ -0,0 +1,30 @@
+/**
+ * @license
+ * Copyright Akveo. All Rights Reserved.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
+ */
+
+@import '../components';
+@import 'overrides/all';
+
+@import '~@nga/theme/styles/themes/nga.theme.default';
+
+$theme-name: 'default';
+
+// @nga/theme module styles
+@include nga-theme($theme-name) {
+  @include nga-theme-overrides($theme-name);
+  @include custom-components-theme($theme-name);
+}
+
+// @nga/bootstrap module styles
+@import '~@nga/theme/overrides/bootstrap/styles/themes/nga.theme.default';
+@include nga-bootstrap($theme-name);
+
+// @nga/maps module styles
+@import '~@nga/theme/overrides/maps/styles/themes/nga.theme.default';
+@include nga-maps($theme-name);
+
+// @nga/typography module styles
+@import '~@nga/theme/overrides/typography/styles/themes/nga.theme.default';
+@include nga-typography($theme-name);

src/app/@theme/styles/default/overrides/all.scss

@@ -0,0 +1,2 @@
+@mixin nga-theme-overrides($theme-name) {
+}

src/app/@theme/styles/light/light.theme.scss

@@ -3,6 +3,7 @@
  * Copyright Akveo. All Rights Reserved.
  * Licensed under the MIT License. See License.txt in the project root for license information.
  */
+
 @import '../components';
 @import 'overrides/all';