Issue #1868930 by nathangervais: Ensure proper capitalization is used throughout the UI.

core/modules/config/config.info.yml

-name: 'Configuration manager'
+name: 'Configuration Manager'
 type: module
 description: 'Allows administrators to manage configuration changes.'
 package: Core

core/modules/rest/rest.info.yml

-name: 'RESTful web services'
+name: 'RESTful Web Services'
 type: module
 description: 'Exposes entities and other resources as RESTful web API'
 package: Core