Free edit fields

[JuneMinazuki]

Added:

1. Migration for new column on project_template_fields
   • t.boolean "free_edit", default: false, null: false
2. Free edit fields:
   • Remain editable after project is approved, all other fields are frozen
   • Editing free edit fields will still trigger creating a new version
3. Student can still edit proposal if there is a free edit field
4. Increase Edit Project Template table width

Appendix:

• Free Edit Field: https://imgur.com/a/3fiBmCz