איך להפעיל בחירה קבוצתית לנושא?

no it’s not there, but it needed to be compatible. you can see the old bulk select stuff removed here when templates were refactored:

https://github.com/discourse/discourse-simple-theme/commit/914f9695abd7938a5502355d3a17fa9c88eeb057#diff-8eab2ad083803db545ff53d060fdd09ef7881cb2708b9083dfca102438e9925d