* Fix stack overflow when calculating class stats with cyclically referenced classes.
* Fix newly created entity dragged from another one:
  * keep newly created entity dragged from another one in TemporaryState;
  * update entity data on changing in edit forms;
  * fix "New NewEntity" label;
  * render edit link dialog in the center of the connection.
* Allow to change IRI of new entities via custom editor.
* Fix LinkLabel rendering for link properties:
  * handle case when function 'onBoundUpdate' is not provided into the LinkLabel component.
* Add close buttons to dialogs, add onCancel to PropertyEditorOptions.
* Fix supporting multiple values of a property in rdfDataProvider.
* Move 'generateElementIri' function into MetadataApi:
  * add usage 'generateIri' when change type of element via form after d'n'd element from another element.
* Allow authoring links in both directions.