Checkmk Werk 12298: Fix "No historic metrics recorded..."

ID: 12298 Title: Fix "No historic metrics recorded..." Component: Livestatus Level: 1 Class: Bug fix Version: 2.1.0i1 In 2.0.0p1 CRE, metrics belonging to different services would be grouped incorrectly. The fix published in 2.0.0p2 introduced another bug in that it is missing the name mangling. This produced the following error for services containing spaces: "No historic metrics recorded but performance data is available. Maybe performance data processing is disabled." This werk should fix both issues.