Entity label/thumbnail is not updated after edit

Problem/Motivation

To reproduce:
1. Enable entity_browser_example
2. Navigate to the provided content type add page
3. Select a node in the appropriate field
4. Edit it and change a title

Expected result:
Title changes in preview

Actual result:
Title doesn't change but it was actually saved.

Proposed resolution

Trigger AJAX request to rebuild previews after edit (similar to what we do after selection was done).