Redirect to user login when Access Denied for a Webform.

Problem

Certain forms required a user to login.

Solution

Add per webform settings that redirects to login screen with a custom message.

Notes

Works identical to Redirect 403 to User Login but allow per Webform setting and message. Custom message per webform is the key difference and the specific requirement being sponsored by my client.

Tasks

• Add 'form_login' and 'form_login_message' to webform settings
• Add 'submission_login' and 'submission_login_message' to webform settings
• 'default_form_login_message' to webform admin settings
• 'default_submission_login_message' to webform admin settings
• Update scheme.
• Update export configuration.
• Add EventSubscriber that redirects to login.