[ACA-3000][ACA-2999] FE - Provide way to show ContextMenu on Task/Process list (#5596)

* [ACA-3000] FE - Provide way to show ContextMenu on Task list

* * Updated docs

* * Added unit tests to the recent changes

lib/process-services/src/lib/process-list/components/process-list.component.ts

@@ -27,7 +27,8 @@ import {
     PaginatedComponent,
     PaginationComponent,
     PaginationModel,
-    UserPreferencesService
+    UserPreferencesService,
+    DataCellEvent
 } from '@alfresco/adf-core';
 import {
     AfterContentInit,
@@ -110,6 +111,14 @@ export class ProcessInstanceListComponent extends DataTableSchema implements OnC
     @Input()
     selectFirstRow: boolean = true;
 
+    /** Toggles custom context menu for the component. */
+    @Input()
+    showContextMenu: boolean = false;
+
+    /** Emitted before the context menu is displayed for a row. */
+    @Output()
+    showRowContextMenu = new EventEmitter<DataCellEvent>();
+
     /**
      * Resolver function is used to show dynamic complex column objects
      * see the docs to learn how to configure a resolverFn.
@@ -284,6 +293,10 @@ export class ProcessInstanceListComponent extends DataTableSchema implements OnC
         }
     }
 
+    onShowRowContextMenu(event: DataCellEvent) {
+        this.showRowContextMenu.emit(event);
+    }
+
     private createRequestNode(): ProcessFilterParamRepresentationModel {
         return new ProcessFilterParamRepresentationModel({
             appDefinitionId: this.appId,