[ADF-4401] Fix DL issues because of nested 'adf-datatable-cell' items (#4615)

* [ADF-4401] remove classname from nested items - use 'adf-content-cell' instead

* [ADF-4401] some DL display fixes

- align header cells with content cells
- columns aligned on Trashcan DL
- ellipsis on long folder names inside the content node selector
- more width on highlight cell from search-results

* [ADF-4401] use 'adf-content-cell'

- to allow ellipsis to display when a parent has 'adf-ellipsis-cell' class

* [ADF-4401] remove not used styles

* [ADF-4401] rename scss classname to have 'adf-datatable' prefix

* [ADF-4401] Add documentation for datatable

lib/content-services/content-node-selector/name-location-cell/name-location-cell.component.ts

@@ -27,7 +27,7 @@ import { DataRow } from '@alfresco/adf-core';
     styleUrls: ['./name-location-cell.component.scss'],
     encapsulation: ViewEncapsulation.None,
     changeDetection: ChangeDetectionStrategy.OnPush,
-    host: { class: 'adf-name-location-cell' }
+    host: { class: 'adf-name-location-cell adf-datatable-content-cell' }
 })
 export class NameLocationCellComponent implements OnInit {