PHNX-1778 > Backend- Persist changes on Save (Fix null)

[GurpinderSandhu]

JIRA Link

https://desire2learn.atlassian.net/browse/PHNX-1778

Description

After changing the backend to require an empty string, we must ensure siren only sends empty strings instead of a string like this "null"

[github-actions[bot]]

PR Checklist:

Did you use a semver keyword in a commit message?

• [ ] Yes I used one in at least one of my commits
• [ ] No but I will use a semver keyword in the commit message when I merge and squash

Did you paste the Jira ticket URL in the description?

• [ ] Yes
• [ ] No as there's no corresponding Jira ticket

[d2l-github-release-tokens[bot]]

:tada: This PR is included in version 3.1.3 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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