hide buttons after submission deadline is passed if form is not editable

[dreamfall]

📝 A short description of the changes

• previously we showed the buttons allowing user in theory to bypass the validations and add 3rd letter of support

🔗 Link to the relevant story (or stories)

• https://app.asana.com/0/1199154381249427/1206476387974016

Deployment implications

✅ Checklist

• Features that cannot go live are behind a feature flag/env var or specify deploy date and open PR as draft
• I have checked that commit messages make sense and explain the reasoning for each change
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have squashed any unnecessary or part-finished commits