NodePath in Array or Dictionary export variable is invalid after moving/renaming node

[pouleyKetchoupp]

Godot version

3.3.2.stable, 4.0.dev (92f20fd)

System information

Windows 10

Issue description

NodePath properties are kept up-to-date in the editor when the path changes for script export variables, except when nested in Array and Dictionary properties.

Steps to reproduce

Using the minimal reproduction project:

1. Open the project in the editor
2. Select Spatial2/Spatial4 node in the tree
3. Observe the node path in all script variables: Spatial3
4. Move Spatial3 node as a child of Spatial5 node
5. Select Spatial2/Spatial4 node again
6. Observe the node path in test_path has been updated to reflect the change
7. Observe the node path is not updated in the array and dictionary properties

Minimal reproduction project

3.x version:
NodePathBug.zip

4.0 version:
NodePathBug-4.0.zip