### Godot version

3.5.1mono

### System information

windows10

### Issue description

Error message
 scene/main/node.cpp:1362 - Index p_index = 0 is out of bounds (data.children.size() = 0).
 scene/main/node.cpp:397 - Parameter "p_child" is null.
 scene/gui/tab_container.cpp:593 - Index p_current = 0 is out of bounds (get_tab_count() = 0).
See "Steps to reproduce for details"

### Steps to reproduce

Set an external text editor
Create a script
Drop the script to the built-in text editor like this image:
![image](https://user-images.githubusercontent.com/119792950/209504041-039f2620-5e42-4c0f-8c41-cd24486fb3d2.png)
And got error message:
 scene/main/node.cpp:1362 - Index p_index = 0 is out of bounds (data.children.size() = 0).
 scene/main/node.cpp:397 - Parameter "p_child" is null.
 scene/gui/tab_container.cpp:593 - Index p_current = 0 is out of bounds (get_tab_count() = 0).

### Minimal reproduction project

An empty project
if (history_pos < history.size() - 1) {
		_update_history_pos(history_pos + 1);
	}
}
void ScriptEditor::_history_back() {
	if (history_pos > 0) {
		_update_history_pos(history_pos - 1);
	}
}
Vector<Ref<Script>> ScriptEditor::get_open_scripts() const {
	Vector<Ref<Script>> out_scripts = Vector<Ref<Script>>();
	for (int i = 0; i < tab_container->get_tab_count(); i++) {
		ScriptEditorBase *se = Object::cast_to<ScriptEditorBase>(tab_container->get_tab_control(i));
		if (!se) {
			continue;
		}
		Ref<Script> scr = se->get_edited_resource();
		if (scr != nullptr) {
			out_scripts.push_back(scr);
		}
	}
	return out_scripts;
}
TypedArray<ScriptEditorBase> ScriptEditor::_get_open_script_editors() const {