Modifying collider of an alternate tile does not mark the TileSet as changed

[KoBeWi]

Godot version

4.0 c44e1c4

System information

Windows 10 x64

Issue description

When you add collision to alternate tile:

It does not make the TileSet "changed". It means that the TileSet will not be saved when you save the project. The TileSet must be external resource for this to happen.

Steps to reproduce

1. Add TileMap
2. Add TileSet with physics layer (be sure to save it as file)
3. Create tiles
4. Create alternate tile
5. Save
6. Add a collider to the alternate tile
7. Draw something using the alternate tile and start the project
8. The collider is not there

Minimal reproduction project

No response