### Godot version

v4.1.rc2.official [46424488e]

### System information

Godot v4.1.rc2 - Linux Mint 20 (Ulyana) - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 2060 SUPER (nvidia; 515.105.01) - Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz (8 Threads)

### Issue description

Dragging and dropping a file to a new position inside its current folder, or onto the icon for its current folder - when that folder is the project root folder :res// - will be treated as though you were dropping a different file with the same name.

Expectation: for nothing to happen.

Also tried it in 4.0.3 and 4.1-dev3, where it behaves as expected.

https://github.com/godotengine/godot/assets/64640811/90de1120-dd92-41b8-b202-db77c343103a

### Steps to reproduce

1. New or existing project.
2. Click and drag a file in :res// in FileSystem dock.
3. Drop the file back into :res//.
4. Be prompted to overwrite or rename.

### Minimal reproduction project

N/A
if (holding_branch) {
		_reselect_items_selected_on_drag_begin();
	}
}
void FileSystemDock::_reselect_items_selected_on_drag_begin(bool reset) {
	TreeItem *selected_item = tree->get_next_selected(tree->get_root());
	if (selected_item) {
		selected_item->deselect(0);
	}
	if (!tree_items_selected_on_drag_begin.is_empty()) {
		bool reselected = false;
		for (TreeItem *item : tree_items_selected_on_drag_begin) {
			if (item->get_tree()) {
				item->select(0);
				reselected = true;
			}
		}
		if (reset) {
			tree_items_selected_on_drag_begin.clear();
		}
		if (!reselected) {
			
			tree->get_root()->get_child(1)->select(0);
		}
	}
	files->deselect_all();