Adds a "Toggle Sensors" verb to the robot/AI to set their HUD

Changes:
1) Adds a "Toggle Sensors" verb to robots and AI's which allows them to set their hud to display security information, medical information or nothing.
2) Removes the security/medical hud from robots.
3) Robots/AI's are now informed when Beepsky arrests someone or medbots detect someone in critical condition.