Werk #7965: Fix updating hosts after editing tags

Component	Setup
Title	Fix updating hosts after editing tags
Date	Jul 5, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.6.0b4 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

When adding new tag groups or aux tags to existing tag choices, these tags were not immediately applied to the host configuration. The tags were applied to the hosts only after editing the host configuration.

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