We are unable to disable a trigger from the "Problems" list. Performing the change from tre list of triggers of the same host works.

Steps to reproduce:

1. Open the problems list (Monitoring > Problems)
2. Click on the problem of a LLD generated trigger
3. Choose Configuration > Trigger from the popup menu
4. Uncheck "Enabled" in the modal dialog
5. Click "Update"

Result:
The trigger rmains active
(no errors logged)

Expected:
The trigger changes to state "disabled"