GraphNode's ports selectable through other graph nodes
Godot version: 269145a346bddae5cbbf00fd17b6c8eac4cd4665
OS/device including version: ArcoLinux Issue description: Whether or not a graph node is covering another graph node's port, it's still possible to drag a connection off. This leads to annoyances where you're trying to move the graph node out of the way, but instead you're disconnecting things by accident. Ideally, ports would not be manipulable while being covered by other graph nodes.

Still valid in 9e7348f
Seems to be fixed, I can't reproduce this in 4.3-dev6. Can someone confirm?
https://github.com/godotengine/godot/assets/2223172/fb6be590-605c-4fd5-9c7f-6833c3b059d9
Still reproducible when you click near the edge.