[ADF-4249] Updates for doc review (#4454)

* [ADF-4249] Updates for doc review

* [ADF-4249] Clarified text slightly

lib/core/about/about.component.ts

@@ -39,8 +39,14 @@ export class AboutComponent implements OnInit {
     modules: ObjectDataTableAdapter;
     extensionColumns: string[] = ['$id', '$name', '$version', '$vendor', '$license', '$runtime', '$description'];
     extensions$: Observable<ExtensionRef[]>;
+
+    /** Commit corresponding to the version of ADF to be used. */
     @Input() githubUrlCommitAlpha = 'https://github.com/Alfresco/alfresco-ng2-components/commits/';
+ 
+    /** Toggles showing/hiding of extensions block. */
     @Input() showExtensions = true;
+ 
+    /** Regular expression for filtering dependencies packages. */
     @Input() regexp = '^(@alfresco)';
 
     ecmHost = '';

lib/core/services/authentication.service.ts

@@ -316,7 +316,8 @@ export class AuthenticationService {
     }
 
     /**
-     * Check if SSO is configured correctly
+     * Checks if SSO is configured correctly.
+     * @returns True if configured correctly, false otherwise
      */
     isSSODiscoveryConfigured() {
         return this.alfrescoApi.getInstance().storage.getItem('discovery') ? true : false;

lib/core/services/content.service.ts

@@ -175,7 +175,7 @@ export class ContentService {
     /**
      * Checks if the user has permission on that node
      * @param node Node to check permissions
-     * @param permission
+     * @param permission Required permission type
      * @returns True if the user has the required permissions, false otherwise
      */
     hasPermissions(node: Node, permission: PermissionsEnum | string): boolean {
@@ -205,7 +205,7 @@ export class ContentService {
     /**
      * Checks if the user has permissions on that node
      * @param node Node to check allowableOperations
-     * @param permission Create, delete, update, updatePermissions, !create, !delete, !update, !updatePermissions
+     * @param allowableOperation Create, delete, update, updatePermissions, !create, !delete, !update, !updatePermissions
      * @returns True if the user has the required permissions, false otherwise
      */
     hasAllowableOperations(node: Node, allowableOperation: AllowableOperationsEnum | string): boolean {