### Godot version

v4.0.beta.custom_build [0abd60b95]

### System information

Windows 10, Vulkan

### Issue description

Autocomplete doesn't work when trying to access a scene node that isn't a direct child of the scene root script, using $NodePath (Shorthand for get_node("NodePath") as per docs).

Example:
![image](https://user-images.githubusercontent.com/115422160/212197922-10e73c9f-de10-475e-ac6e-4163fc5b8013.png)

It worked in Godot 3.5:
![3.5](https://user-images.githubusercontent.com/115422160/212197992-61b67a42-86c6-4650-bab4-c7dfa5a67975.PNG)

I should mention that it works if you start by typing the name of a direct child:
![image](https://user-images.githubusercontent.com/115422160/212198641-6d8e6fca-a2d2-47a7-b627-2df95268daf5.png)

But when you have many nodes in the scene and longer names it's a pain to access the last children like that.


### Steps to reproduce

See above or MRP.

### Minimal reproduction project

[autocomplete bug.zip](https://github.com/godotengine/godot/files/10406695/autocomplete.bug.zip)

const String line = get_line(caret_line);
			int caret_col = get_caret_column(i);
			int caret_remove_line = caret_line;
			bool merge_text = true;
			int in_string = is_in_string(caret_line, caret_col);
			if (in_string != -1) {
				Point2 string_end = get_delimiter_end_position(caret_line, caret_col);
				if (string_end.x != -1) {
					merge_text = false;
					caret_remove_line = string_end.y;
					caret_col = string_end.x - 1;
				}
			}
			if (merge_text) {
				for (; caret_col < line.length(); caret_col++) {
					if (is_symbol(line[caret_col])) {
						break;
					}
				}
			}
			
			remove_text(caret_line, get_caret_column(i) - code_completion_base.length(), caret_remove_line, caret_col);
			adjust_carets_after_edit(i, caret_line, caret_col - code_completion_base.length(), caret_remove_line, caret_col);
			set_caret_column(get_caret_column(i) - code_completion_base.length(), false, i);
			insert_text_at_caret(insert_text, i);
		} else {
			
			const String line = get_line(caret_line);
			int caret_col = get_caret_column(i);