LPS-32158 Create tabs and move existing configuration to display-settings (following Blogs pattern)
LPS-32158 Add configuration saving templates for email notifications when adding or updating documents (following Blogs pattern for code and Journal for templates)
LPS-32158 Unify preferences in Documents and Media (so the configuration will appear in Control Panel)
LPS-32158 Logic for validating display style views is no longer necessary
LPS-32158 Handle errors when some of the subscription fields are empty