### 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.
accept_event();
			queue_redraw();
			return;
		}
		if (code_completion_active && code_completion_rect.has_point(mb->get_position())) {
			if (!mb->is_pressed()) {
				accept_event();
				return;
			}
			is_code_completion_drag_started = true;
			switch (mb->get_button_index()) {
				case MouseButton::WHEEL_UP: {
					if (code_completion_current_selected > 0) {
						code_completion_current_selected--;
						code_completion_force_item_center = -1;
						queue_redraw();
					}
				} break;
				case MouseButton::WHEEL_DOWN: {
					if (code_completion_current_selected < code_completion_options.size() - 1) {
						code_completion_current_selected++;
						code_completion_force_item_center = -1;
						queue_redraw();
					}
				} break;
				case MouseButton::LEFT: {
					if (code_completion_force_item_center == -1) {
						code_completion_force_item_center = code_completion_current_selected;
					}
					code_completion_current_selected = CLAMP(code_completion_line_ofs + (mb->get_position().y - code_completion_rect.position.y) / get_line_height(), 0, code_completion_options.size() - 1);