Problem description: If a Mass update is executed for items, item prototypes, triggers or trigger prototypes, then the checkboxes in the list of these entities remain checked after the mass update operation is performed.

Steps to reproduce:

1. Open the list of items for any host that has multiple items
2. Check several items
3. Press "Mass update" button
4. In the opened dialog select "Desciption" checkbox and enter any value in the input element.
5. Submit the Mass update dialog

Result: the previously selected checkboxes are still set to true
Expected: after Mass update execution the previously selected checkboxes should be unset.