Problem/Motivation
In #2962525: Create a field widget for the Media library module a new field widget is being added to core that lets you visually select media in a view. When media is selected, it's rendered inside the field widget in a specific view mode.
This view, nor the view mode is configurable right now, but they should be to enable re-use of the widget and configuration for users.
Proposed resolution
Add tests, configuration, and a configuration form to the Media library field widget that allows these settings to be configured.
Remaining tasks
Write a patch.
User interface changes
None.
API changes
None.
Data model changes
None.