message: added mailto to email link.
diff: <ul data-test-meeting-email-address-line>
  {{#if this.meeting.isAcceptingTypeOne}}
  <li>
  - {{t 'meetings.detail.meeting-detail-header.email_text'
  + {{t 'meetings.detail.meeting-detail-header.email_text_mail_to'
  typeName=this.meeting.fieldNames.submission1_plural
  emailAddress=this.meeting.typeOneSubmissionEmail
  htmlSafe=true
  {{#if this.meeting.isAcceptingTypeTwo}}
  <li>
  - {{t 'meetings.detail.meeting-detail-header.email_text'
  + {{t 'meetings.detail.meeting-detail-header.email_text_mail_to'
  typeName=this.meeting.fieldNames.submission2_plural
  emailAddress=this.meeting.typeTwoSubmissionEmail
  htmlSafe=true
  