Engine plate decouplers cause the top-attached part to be shielded from airstream

[gotmachine]

ModuleDecouple on engine plates is setting all attached parts as "shielded from airstream", excepted the part attached to the node defined in the bottomNodeName of the ModuleJettison module.

The intent is to disable drag (as well as some interactions like deploying animated parts) on all other node-attached parts, but "all other node-attached parts" will also typically include the part attached to the engine plate top node, which is clearly an unwanted oversight.

Fundamentally, ModuleDecouple is missing a way to define exclusions or inclusions for airstream-shielded nodes in its config. Implementing such a config option is difficult and would require concrete patches for every stock and modded part using isEnginePlate = true.

Alternatively, we can use some heuristics to determine which nodes should be excluded. For all stock engine plates, excluding nodes with id = "top" would work, but there is no guarantee this would hold true with modded parts.

Another heuristic would be to exclude all nodes whose orientation is significantly different than the node identified by the bottomNodeName of the ModuleJettison module. This might fail in case of a complex modded part setup, but as of writing a quick github search show no potential issue.