Ability to send emails from helpdesk UI

[vilmibm]

The Ticket admin UI should allow sending an email to the address on the ticket.

This issue also includes support for picking a message template to fill the textarea in with; most tickets are "help i need this key added" and being able to two-click send an email with a templated message would make clearing out the help queue much easier.

• support for email templates in DB
• expose email templates in UI
• support for sending email via textarea