[AAE-7817] Add columns selector for processes and tasks tasks (#7612)

* [AAE-7817] Add columns selector for processes and tasks tasks

* cr

* Update

* fix unit tests

* preserve order while sorting

* add input toggle to show main actions

* fix test

demo-shell/src/app/components/datatable/datatable.component.html

@@ -20,6 +20,7 @@
         [actions]="true"
         [resolverFn]="resolver"
         rowStyleClass="custom-row-style"
+        [showMainDatatableActions]="true"
         (showRowActionsMenu)="onShowRowActionsMenu($event)"
         (executeRowAction)="onExecuteRowAction($event)">
         <!-- HTML column definition demo -->