Checkmk Werk 13923: Dashboard elements: Fix title macros

ID: 13923 Title: Dashboard elements: Fix title macros Component: Multisite Level: 1 Class: Bug fix Version: 2.2.0i1 The macros $HOST_NAME$ and $SERVICE_DESCRIPTION$ which can be used in the custom title of dashboard elements were without function. This is fixed: Whenever context information about host name or service description is available, the respective macro is replaced by this context information.