[ADF-1949 ] Allow customization of the dropdown menu on document picker (#2660)

* [ADF-1949] Allow customization of the dropdown menu on document picker

- add as input properties the 'dropdownHideMyFiles' and the 'dropdownSiteList' to the destination picker, so the list of sites from the dropdown can be customized, if wanted
- add navigation on '-mysites-' entries on document-list
- use custom dropdown on the copy/move document picker

* [ADF-1949] do not use a custom dropdown on the copy/move document picker on ADF side, because this can be done only on ACA side

* [ADF-1949] handling the node-dblclick event on content-node-selector.component instead of doing it on the document-list component

- and update the sites-dropdown documentation file

* [ADF-1949] changes requested on code review

* [ADF-1949] fix failing tests

lib/content-services/site-dropdown/sites-dropdown.component.ts

@@ -28,22 +28,22 @@ export class DropdownSitesComponent implements OnInit {
     @Input()
     hideMyFiles: boolean = false;
 
+    @Input()
+    siteList: any[] = null;
+
     @Output()
     change: EventEmitter<SiteModel> = new EventEmitter();
 
     public MY_FILES_VALUE = 'default';
 
-    siteList = [];
-
     public siteSelected: string;
 
     constructor(private sitesService: SitesApiService) {}
 
     ngOnInit() {
-        this.sitesService.getSites().subscribe((result) => {
-            this.siteList = result;
-        },
-        (error) => {});
+        if (!this.siteList) {
+            this.setDefaultSiteList();
+        }
     }
 
     selectedSite() {
@@ -56,4 +56,12 @@ export class DropdownSitesComponent implements OnInit {
         this.change.emit(siteFound);
     }
 
+    setDefaultSiteList() {
+        this.siteList = [];
+        this.sitesService.getSites().subscribe((result) => {
+                this.siteList = result;
+            },
+            (error) => {});
+    }
+
 }