### 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.
ERR_FAIL_COND(p_highlighter.is_null());
	highlighters[p_highlighter->_get_name()] = p_highlighter;
	highlighter_menu->add_radio_check_item(p_highlighter->_get_name());
}
void ScriptTextEditor::set_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) {
	ERR_FAIL_COND(p_highlighter.is_null());
	HashMap<String, Ref<EditorSyntaxHighlighter>>::Iterator el = highlighters.begin();
	while (el) {
		int highlighter_index = highlighter_menu->get_item_idx_from_text(el->key);
		highlighter_menu->set_item_checked(highlighter_index, el->value == p_highlighter);
		++el;
	}
	CodeEdit *te = code_editor->get_text_editor();
	p_highlighter->_set_edited_resource(script);
	te->set_syntax_highlighter(p_highlighter);
}
void ScriptTextEditor::_change_syntax_highlighter(int p_idx) {