[ACS-4592] missing right click menu on row and left click is only allow on indicator rotate (#8327)

* ACS-4592 Displaying context menu for tree list row and allow to expand row by clicking at label

* ACS-4592 Added clicking on label for load more button

* ACS-4592 Unit tests

* ACS-4592 Added documentation for context menu for tree component and fixed lint issues

* ACS-4592 Trigger stuck check

lib/content-services/src/lib/tree/models/tree-context-menu-result.interface.ts

@@ -0,0 +1,21 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export interface TreeContextMenuResult<T> {
+    row: T;
+    contextMenuOption: any;
+}