CRM/Admin/Form/ScheduleReminders - Less stupid field ordering

Old field ordering:
 * When:
 * Record activity for automated email?
 * Repeat:
 * Email:
   * Send email?
   * Use Template
   * Subject

New field ordering:
 * When:
 * Repeat:
 * Email
   * Send email?
   * Record activity for automated email?
   * Use Template
   * Subjec

This is less-stupid because:
 * It doesn't breakup the When/Repeat sections
 * It puts the email options together
Merge pull request #4111 from totten/4.5-schedrem-order

CRM/Admin/Form/ScheduleReminders - Less stupid field ordering