### 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.
code_completion_force_item_center = -1;
			queue_redraw();
			accept_event();
			return;
		}
		if (k->is_action("ui_end", true)) {
			code_completion_current_selected = code_completion_options.size() - 1;
			code_completion_force_item_center = -1;
			queue_redraw();
			accept_event();
			return;
		}
		if (k->is_action("ui_text_completion_replace", true) || k->is_action("ui_text_completion_accept", true)) {
			confirm_code_completion(k->is_action("ui_text_completion_replace", true));
			accept_event();
			return;
		}
		if (k->is_action("ui_cancel", true)) {
			cancel_code_completion();
			accept_event();
			return;
		}
		if (k->is_action("ui_text_backspace", true)) {
			backspace();
			_filter_code_completion_candidates_impl();
			accept_event();
			return;
		}
		if (k->is_action("ui_left", true) || k->is_action("ui_right", true)) {
			update_code_completion = true;