When we don't know the amount, pre-auth the card but don't confirm, then update the amount requested

Allow submission of drupal webform when there are multiple processors on the page (eg. Stripe + Pay later)

Validate payment forms using javascript so we don't create multiple uncaptured paymentIntents when the form is not valid

Fix repeatContribution - pass the found contribution ID instead of using a separate previous_contribution variable - fixes \!2