Release notes for Content Studio 5.2

[alansemenov]

• [x] Project graph
• [x] Reference check in the Unpublish dialog
• [x] Configurable default Publish From time
• [x] Configurable default email sender
• [x] Project Wizard improvements: preset parent project, removed type selection, apps inherited from parent
• [x] Performance improvements: no refresh on Mark as Ready/Publish/Unpublish, no permission fetch on content update
• [x] New styling of regions
• [x] Decorative images