Autosuggest when linking to external content

User Story

As a content author, I want an autosuggest feature, so that I can find the external content item I am looking for.

Acceptance criteria:

• A search interface in a chooser dialog will provide an autosuggest when the user types in the search field.
• Maybe a user does not even have to open a chooser dialog but can get autosuggest directly in the link field.
• A select field can also be configured to provide an autosuggest when the user types in the field.
• Works with light development.

External content systems (like PIM and DAM) can hold 1000's of content items, it can be impossible for an author to find or discover a content item. A search feature is necessary to enable this.

Note: Probably a findbar search results supplier could be leveraged to implement this.