Cannot adjust lanes and paths with new DPE in O3DE

[michalpelka]

Describe the issue
Cannot adjust lanes and paths with new DPE in O3DE

What is more, I cannot add a new one, because "Enter key" window has focus and I cannot set entityId

Expected behavior
Use another container, e.g. vector/map, that allows to add splines and adjust content.

Actual behavior
I cannot do a damn thing. I need to edit the prefab in notepad.

Steps to reproduce
Steps to reproduce the behavior:

1. Create "LaneComponent"
2. Try to add any entity.

Screenshots/Video
I've added in the first paragraphh

Found in Branches
Names of or links to the branches where the issue occurs. Please provide the SHA/hash that identifies the latest commit if necessary; tag should be enough for o3de/o3de and o3de/o3de-extras, as the demo is expected to run with the stable releases of o3de.

• this demo: development
• o3de: stabilization/2409
• o3de-extras: stabilization/2409

Desktop/Device (please complete the following information):

• OS Ubuntu 22.04
• CPU Intel
• GPU Nvidia GTX 4080.
• Memory [96GB]

Additional context
Add any other context about the problem here.