Fixed inconsistent tweet status for scheduled post

[iamdharmesh]

Description of the Change

PR fixes Inconsistent tweet status for the scheduled post.

Closes #225

How to test the Change

1. Set the tweet option of a post to "Don't Tweet".
2. Save status by updating ("Schedule") the post.
3. Refresh the browser, or go elsewhere in the admin and return to edit the post.
4. Verify that tweet option is still on "Don't Tweet".

Changelog Entry

Fixed - Inconsistent tweet status for scheduled post

Credits

Props @mae829 @iamdharmesh

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.