Werk #13923: Dashboard elements: Fix title macros

Component	User interface
Title	Dashboard elements: Fix title macros
Date	Jun 9, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p3 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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.

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