Fix reimporting scene with default values selected

[kdiduk]

This commit fixes #78140

When the scene was re-imported with non-default values of some settings, re-importing it again using default values for those settings didn't have the effect. For example, the ticket #78140 mentions this issue with "Root Type" setting, however the problem affected any setting.

The reason of the problem was that when handling the reimport, a wrong dictionary object of the settings was used.

[kdiduk]

Although everything seems to be working now, I still doubt whether we need to remove the if-condition in this block:

godot/editor/import/resource_importer_scene.cpp

Lines 2433 to 2442 in 202e4b2

	if (root_type != "Node3D") {
	Node *base_node = Object::cast_to<Node>(ClassDB::instantiate(root_type));
	if (base_node) {
	scene->replace_by(base_node);
	scene->set_owner(nullptr);
	memdelete(scene);
	scene = base_node;
	}
	}

[fire]

@aaronfranke is also working in this area from the gltf document

[aaronfranke]

Tested, this works as expected, and the fix makes sense.

Although everything seems to be working now, I still doubt whether we need to remove the if-condition in this block:

I have already fixed this logic in PR #79774, feel free to give it a review.

[aaronfranke]

Thanks! I hit the merge button myself due to how simple the fix is and I tested it.

[akien-mga]

For the record for future commits, we don't usually prefix commits with a type like "[bugfix]". The title starts with "Fix" and makes it clear that it's fixing a bug already.

[kdiduk]

Just in case, if there are more maintenance releases planned for 4.0, this PR can be cherry-picked to 4.0 as well, as the change is trivial, and the bug was originally reported for 4.0.3.

[YuriSizov]

I think for something like that we'd suggest updating to 4.1.x instead.

[YuriSizov]

Cherry-picked for 4.1.3.