HUDPanel already contains a header registered at index 0! Registering at index 1 instead.

[jpvr20]

Describe the bug
HUDPanel already contains a header registered at index 0! Registering at index 1 instead.

To Reproduce
Steps to reproduce the behavior:

1. Open the Scene that calls the ROSConnection GetOrCreateInstance()
2. Change to some other scene that doesn't contain any ROS stuff
3. Call the first Scene again

Console logs / stack traces

HUDPanel already contains a header registered at index 0! Registering at index 1 instead.
UnityEngine.Debug:LogWarning (object)
Unity.Robotics.ROSTCPConnector.HudPanel:RegisterHeader (System.Action,int) (at ./Library/PackageCache/com.unity.robotics.ros-tcp-connector@c27f00c6cf/Runtime/TcpConnector/HudPanel.cs:120)
Unity.Robotics.ROSTCPConnector.ROSConnection:Start () (at ./Library/PackageCache/com.unity.robotics.ros-tcp-connector@c27f00c6cf/Runtime/TcpConnector/ROSConnection.cs:484)

Expected behavior
UI should show just one TCP connection

Screenshots

Environment (please complete the following information, where applicable):

• Unity Version: Unity 2022.3.10f1<OpenGL 4.5>
• Unity machine OS + version: Ubuntu 20.04
• ROS machine OS + version: Ubuntu 20.04, ROS Noetic
• ROS–Unity communication: TCP
• Branch or version: 0.7.0