### 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.
auto_brace_completion_pairs.clear();
	Array keys = p_auto_brace_completion_pairs.keys();
	for (int i = 0; i < keys.size(); i++) {
		add_auto_brace_completion_pair(keys[i], p_auto_brace_completion_pairs[keys[i]]);
	}
}
Dictionary CodeEdit::get_auto_brace_completion_pairs() const {
	Dictionary brace_pairs;
	for (int i = 0; i < auto_brace_completion_pairs.size(); i++) {
		brace_pairs[auto_brace_completion_pairs[i].open_key] = auto_brace_completion_pairs[i].close_key;
	}
	return brace_pairs;
}
bool CodeEdit::has_auto_brace_completion_open_key(const String &p_open_key) const {
	for (int i = 0; i < auto_brace_completion_pairs.size(); i++) {
		if (auto_brace_completion_pairs[i].open_key == p_open_key) {
			return true;
		}
	}
	return false;
}
bool CodeEdit::has_auto_brace_completion_close_key(const String &p_close_key) const {
	for (int i = 0; i < auto_brace_completion_pairs.size(); i++) {
		if (auto_brace_completion_pairs[i].close_key == p_close_key) {
			return true;
		}
	}
	return false;
}
String CodeEdit::get_auto_brace_completion_close_key(const String &p_open_key) const {