Add ability to have canned/pre-set messages for chat

Partner asks that we provide a means of having preset chat messages that they can send to their remote clients.

This would probably be something like the Command Toolbox extension, where users can enter up to X number of preset chat messages.

AC:
1. You should then be able to send the preset chat messages from either Host client or from the Host page.
2. Messages should be configurable
2. Messages should paste to the chat window, but allow the host to edit before sending the message