[ADF-4894] Json editor dialog (#5082)

* move download-zip to its own folder

* json dialog

* update docs

* update test

* disable e2e test

* json widget for the Form

* remove deprecated test

* fix tests, update display text name

lib/core/data-column/data-column.component.ts

@@ -70,6 +70,9 @@ export class DataColumnComponent implements OnInit {
     @Input()
     copyContent: boolean;
 
+    @Input()
+    editable: boolean = false;
+
     ngOnInit() {
         if (!this.srTitle && this.key === '$thumbnail') {
             this.srTitle = 'Thumbnail';