Checkmk Werk 14319: Fix error on using folder in rule search

ID: 14319 Title: Fix error on using folder in rule search Component: Setup Level: 1 Class: Bug fix Version: 2.2.0i1 If the option "Folder" was used in the rule search, submitting the search button lead to the error "The selected element 'None' is not longer available. Please select something else.".