[2] fixed issue #85 (GUI defaults to info log instead of diagnostics)
[2] fixed issue #85 (GUI defaults to info log instead of diagnostics)

The problem:
    The GUI defaulted to the info log tab in the dialog box.
The solution:
    In addition to previous edits to rover_gui_plugin.ui, we now also
    strictly enforce this tab as the default directly in the code
    when the RQT rover GUI is launched.

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