* WIP updating config-ui engine to use api service and form class
* updates form-field component to support false values for radio types
* updates api-error-message util to log out error in dev env
* fixes issues in custom messages create and edit workflows
* fixes issues in api service
* updates capabilities handling
* updates to custom messages form
* removes store from custom messages tests
* removes store as dependency from config-ui engine
* removes commented out code in messages route
* updates custom-messages service to make requests with api service
* removes namespace args from fetchMessages
* adds tests for custom-messages service
* removes custom messages model, adapter and serializer
* removes custom messages serializer tests
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