Check_MK Werk 6345: Fixed invisible/lost notification rules when editing notification rules

ID: 6345 Title: Fixed invisible/lost notification rules when editing notification rules Component: Notifications Level: 2 Class: Bug fix Version: 1.6.0i1 Since werk #4167 it was possible to prevent users from configuring specific notification plugins by setting the notification plugin permissions to "no". As a result all notification rules that use the not permitted notification plugin were not visible anymore to this user. This hiding of rules could be confusing and lead to bugs. We decided to show all rules now but prevent modifications of these rules when the user is not permitted to perform the modifications. When cloning notification rules or creating notification rules with identical parameters only one of the rules was shown. The others could be hidden, but still be in existing. In other situations, when a user with limited permissions on notification plugins edits the notification rules, it could happen that all notification rules that use other plugins were deleted by accident. These problems were introduced with werk #4167. CMK-556