Add UniqueEntity assertion to Email entity based on "email" property.

Signed-off-by: Max Fierke <max@maxfierke.com>
Add UniqueEntity constraint to Person entity based on x500

Signed-off-by: Max Fierke <max@maxfierke.com>
Fix createAction() so that form validation errors are displayed without triggering an exception.

Signed-off-by: Max Fierke <max@maxfierke.com>
Fix incorrect contextual alert CSS class in form layout.

Signed-off-by: Max Fierke <max@maxfierke.com>