Fix SubscriptionView to keep emails when emails are erroneous

app/templates/account/subscription-view.jade

@@ -152,7 +152,7 @@ block content
         else
           if emailValidator.state === 'invalid'
             div.invalid-email-message(aria-hidden="true") please make sure all entries are valid emails
-          textarea.recipient-emails(rows=3, data-i18n="[placeholder]subscribe.recipient_emails_placeholder")=emailValidator.emailString()
+          textarea.recipient-emails(rows=3, data-i18n="[placeholder]subscribe.recipient_emails_placeholder")=emailValidator.lastEmails
           div
             button.recipients-subscribe-button.btn.btn-lg.btn-success(data-i18n="subscribe.subscribe_users")
           if view.recipientSubs.state === 'declined'

app/views/account/SubscriptionView.coffee

@@ -107,6 +107,7 @@ module.exports = class SubscriptionView extends RootView
 class EmailValidator
 
   validateEmails: (emails, render) ->
+    @lastEmails = emails.join('\n')
     #taken from http://www.regular-expressions.info/email.html 
     emailRegex = /[A-z0-9._%+-]+@[A-z0-9.-]+\.[A-z]{2,4}/
     @validEmails = (email for email in emails when emailRegex.test(email.trim().toLowerCase()))