Follow up for #1964648: Create configuration schemas for editor module
Problem/Motivation
*.schema.yml files has different label("Langcode", "Language", "Default language".) for 'langcode' field.
Proposed resolution
We can stick with 'Language' where we can't be changed and 'Default language' where we can.
Remaining tasks
Update all schema files once all schemas are in. Can check http://drupal.org/project/issues/search/drupal?status%5B%5D=1&status%5B%...