Checkmk Werk 15000: Fix combined graphs in reports

ID: 15000 Title: Fix combined graphs in reports Component: Reporting & Availability Level: 1 Class: Bug fix Version: 2.2.0i1 Since werk #14295 in version 2.1.0p14, some combined graphs showed an exception like "Cannot render graph: host, service description or regex not found in context". A workaround was, to edit the content element and set the missing context filter. Unfortunately, if you used host or service groups as filter, this workaround didn't work.