Email center: ensure custom template properties are available to layouts and prepParams handlers

Description

Allow customization of the edit email template form. additional fields should then be available to both layout rendering views and message prep handlers. To allow more flexibility.

Placeholder variables should also be replaced in full rendered layouts to ensure that any placeholders placed in custom layouts are fully rendered.

Assignee

Dominic Watson

Reporter

Johnson Cheng

Labels

None

Accepted

Yes

Fix versions

Priority

Low
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