### Godot version

4.0 dev_build

### System information

Ubuntu 22.04.1

### Issue description

The "Lookup Symbol" button don't appears for custorm class names.
Related issues: #68475,  #73167.
I tried apply #68311, #69473 and #73196. It don't helps.
The `Ctrl+LMB` works right for all cases.

### Steps to reproduce

Right click to the `CustomClassA` symbol in the `custom_class_b.gd` anywhere. The `Lookup Symbol` button don't appears in the context menu.

### Minimal reproduction project

Example from  #68475.
return symbol_lookup_on_click_enabled;
}
String CodeEdit::get_text_for_symbol_lookup() {
	Point2i mp = get_local_mouse_pos();
	Point2i pos = get_line_column_at_pos(mp, false);
	int line = pos.y;
	int col = pos.x;
	if (line == -1) {
		return String();
	}
	StringBuilder lookup_text;
	const int text_size = get_line_count();
	for (int i = 0; i < text_size; i++) {
		String line_text = get_line(i);
		if (i == line) {
			lookup_text += line_text.substr(0, col);
			
			lookup_text += String::chr(0xFFFF);
			lookup_text += line_text.substr(col, line_text.size());
		} else {
			lookup_text += line_text;
		}
		if (i != text_size - 1) {
			lookup_text += "\n";
		}
	}
	return lookup_text.as_string();
}
void CodeEdit::set_symbol_lookup_word_as_valid(bool p_valid) {