[ADF-5219] Refactor Document list Filters (#6092)

* First commit

* Second commit

* Commit 4

* Add unit tests

* Fix unit tests

* Add documentation for breaking change

* Fix rebase

* Fix unit test

lib/core/datatable/directives/custom-header-filter-template.directive.ts

@@ -1,28 +0,0 @@
-/*!
- * @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.
- */
-
-import { Directive, ContentChild, TemplateRef } from '@angular/core';
-
-@Directive({
-    selector: 'adf-custom-header-filter-template'
-})
-export class CustomHeaderFilterTemplateDirective {
-
-    @ContentChild(TemplateRef)
-    template: any;
-
-}