Bug fix: re-added the duplicate collected tag check in the GUI.
Bug fix: re-added the duplicate collected tag check in the GUI.

Removing the check caused an extra collected tag increment when rovers were switched.

BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS