HEEDLS-495 - All delegates - single welcome email fix

[ibrahimmunir14]

JIRA link

HEEDLS-495

Description

• Modify link in set password email
• Address delegates by full name (firstname + lastname) in emails from tracking system, even if firstname is null

Screenshots

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Developer checks

I have:

• Run the formatter and made sure there are no IDE errors.
• Written tests for the changes (controller, data services, services, view models etc) and manually tested my work with and without JavaScript. Full manual testing guidelines can be found here: https://softwiretech.atlassian.net/wiki/spaces/HEE/pages/6703648740/Testing
• Updated/added documentation in Swiki and/or Readme.
• Updated my Jira ticket with information about other parts of the system that were touched as part of the MR and have to be sanity tested to ensure nothing’s broken.
• Scanned over my own MR to ensure everything is as expected.

[JBsoftwire]

Looks good, assuming that User.cs is just line ending changes.

[stellake]

Looks good - just double check the line endings before merge 👍