### 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.
add_gutter();
	set_gutter_name(gutter_idx, "main_gutter");
	set_gutter_draw(gutter_idx, false);
	set_gutter_overwritable(gutter_idx, true);
	set_gutter_type(gutter_idx, GUTTER_TYPE_CUSTOM);
	set_gutter_custom_draw(gutter_idx, callable_mp(this, &CodeEdit::_main_gutter_draw_callback));
	gutter_idx++;
	
	add_gutter();
	set_gutter_name(gutter_idx, "line_numbers");
	set_gutter_draw(gutter_idx, false);
	set_gutter_type(gutter_idx, GUTTER_TYPE_CUSTOM);
	set_gutter_custom_draw(gutter_idx, callable_mp(this, &CodeEdit::_line_number_draw_callback));
	gutter_idx++;
	
	add_gutter();
	set_gutter_name(gutter_idx, "fold_gutter");
	set_gutter_draw(gutter_idx, false);
	set_gutter_type(gutter_idx, GUTTER_TYPE_CUSTOM);
	set_gutter_custom_draw(gutter_idx, callable_mp(this, &CodeEdit::_fold_gutter_draw_callback));
	gutter_idx++;
	connect("lines_edited_from", callable_mp(this, &CodeEdit::_lines_edited_from));
	connect("text_set", callable_mp(this, &CodeEdit::_text_set));
	connect("text_changed", callable_mp(this, &CodeEdit::_text_changed));
	connect("gutter_clicked", callable_mp(this, &CodeEdit::_gutter_clicked));
	connect("gutter_added", callable_mp(this, &CodeEdit::_update_gutter_indexes));
	connect("gutter_removed", callable_mp(this, &CodeEdit::_update_gutter_indexes));
	_update_gutter_indexes();
}
CodeEdit::~CodeEdit() {