[ACA-1508] extensions: wave 1 (#480)

* initial structure scaffold

* core extensions module

* simple navbar composition

* allow using app routes instead of registered

* migrate to new navbar setup

* remove commented out tests

* populate toolbar

* evaluate expressions

* redirect to url from toolbar

* populate "open with" viewer menu

* update test setup

* experimental flag for extensions

* test fixes

* fix tests

* code improvements, order support

* improve routing management

* populate "create" menu

* extra dictionaries for spellcheck

* allow disabling extension content

* support file/folder targets for toolbar actions

* add safety check

* navigate directly

* toolbar actions for all pages

* support route data

* "experimental" flag for "create" menu extensions

* code fixes

src/app/app.component.ts

@@ -37,6 +37,7 @@ import {
     SetLanguagePickerAction,
     SetSharedUrlAction
 } from './store/actions';
+import { ExtensionService } from './extensions/extension.service';
 
 @Component({
     selector: 'app-root',
@@ -51,7 +52,8 @@ export class AppComponent implements OnInit {
         private store: Store<AppStore>,
         private config: AppConfigService,
         private alfrescoApiService: AlfrescoApiService,
-        private authenticationService: AuthenticationService) {
+        private authenticationService: AuthenticationService,
+        private extensions: ExtensionService) {
     }
 
     ngOnInit() {
@@ -83,6 +85,12 @@ export class AppComponent implements OnInit {
 
                 pageTitle.setTitle(data.title || '');
             });
+
+        this.extensions.init();
+
+        this.router.config.unshift(
+            ...this.extensions.getApplicationRoutes()
+        );
     }
 
     private loadAppSettings() {