Change record status: 
Project: 
Introduced in branch: 
8.0.x
Introduced in version: 
8.0-alpha15
Description: 

In previous versions of Drupal 8 view mode and form modes were provided by the Entity module.
This meant config files were named entity.view_mode.{entity_type}.{id}.yml and entity.form_mode.{entity_type}.{id}.yml.

This meant the entity module was always required.

#2031717: Make entity module not required moved these to the core namespace allowing the entity module to be non-required.

As part of this the config IDs changed as follows

Form modes

- modules/mymodule/config/install/entity.form_mode.my_entitytype.my_form_mode.yml
+ modules/mymodule/config/install/core.entity_form_mode.my_entitytype.my_form_mode.yml

View modes

- modules/mymodule/config/install/entity.view_mode.my_entitytype.my_view_mode.yml
+ modules/mymodule/config/install/core.entity_view_mode.my_entitytype.my_view_mode.yml
Impacts: 
Site builders, administrators, editors
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done