fix: switch sign in ctas to sentence case

[ludtkemorgan]

This PR addresses this slack message

• [x] Addresses the issue in full
• [ ] Addresses only certain aspects of the issue

Description

During the log in process on Partners the action buttons had a mix of capitalization. After a slack conversation it was determined that they should all be sentence case. This PR update all buttons on the MFA sign in flow.

Note: It does not change the first "Sign In" button since that is used in other places and I need to get verification that it should be updated everywhere.

Also updated a minor bug where when switching to the "Application" tab for a listing in partners the listing status flashes as "draft". This is more noticeable when there are a lot of applications since it takes a while to load the rest of the page.

How Can This Be Tested/Reviewed?

Sign into the partner site using an MFA account. All of the log in buttons should only have the first word capitalized

Author Checklist:

• [ ] Added QA notes to the issue with applicable URLs
• [ ] Reviewed in a desktop view
• [ ] Reviewed in a mobile view
• [ ] Reviewed considering accessibility
• [ ] Added tests covering the changes
• [ ] Made corresponding changes to the documentation
• [ ] Ran yarn generate:client and/or created a migration when required

Review Process:

• Read and understand the issue
• Ensure the author has added QA notes
• Review the code itself from a style point of view
• Pull the changes down locally and test that the acceptance criteria is met
• Either (1) explicitly ask a clarifying question, (2) request changes, or (3) approve the PR, even if there are very small remaining changes, if you don't need to re-review after the updates

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