Werk #10510: Added more link views for Host Groups (Summary)

Component	User interface
Title	Added more link views for Host Groups (Summary)
Date	Oct 31, 2019
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0p6 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

The view Host Groups (Summary) did not have any links in the shown data, that would display more details. With this change, all statistics are now linked to such a more detailed view.

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