Features
- add onboard preview dialog on row click in Ready to Onboard tab
- replace Start Onboarding link with proposal picker dialog
- add clientSubmittedAt field to Onboarding model
- migration for clientSubmittedAt on Onboarding
Bug Fixes
- pass clientSubmittedAt to client portal view
- persist client submission to DB and send emails non-blocking
- show 'All done' on refresh using persisted clientSubmittedAt