Checkmk Werk 12311: Views: host custom attribute: Fix grouping, add sorting

ID: 12311 Title: Views: host custom attribute: Fix grouping, add sorting Component: Setup Level: 1 Class: Bug fix Version: 2.1.0i1 Grouping for a single host custom attribute works now, before this fix the group was determined by all host custom attributes of the host. Grouping by a host custom attribute is of limited usefulness without sorting, so sorting for host custom attributes was added.