* [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
* [ADF-1918] added new search api service to search component
* [ADF-1918] fixed close panel on empty search word
* [ADF-1918] added documentation for search changes
* [ADF-1918] fixed closing of subscription on destroy
