Checkmk Werk 7348: Fix rule match diagnose after moving a rule

ID: 7348 Title: Fix rule match diagnose after moving a rule Component: Multisite Level: 1 Class: Bug fix Version: 1.6.0i1 The host/service context was lost when moving a rule from one position to another in a ruleset. This made the page title change to "[Ruleset title] '{}'" instead of "[Ruleset title] '[service description]'". The rule match diagnose did not work correctly in this situation.