Alert message customization - option to remove reply actions text

Please add a configuration option to disable/enable adding the reply section to alert messages.  This option must be configurable by recipient group.

You may reply to this alert with these commands:
  - ACK (comment) - acknowledge alert
  - NEXT - escalate to next contact
  - SDT X - schedule downtime for this alert on this host for X hours.
  - SDT datasource X - SDT for all instances of the datasource on this host for X hours
  - SDT host X - SDT for entire host for X hours