Werk #11862: Fix label completion

Component	Setup
Title	Fix label completion
Date	Jan 3, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0b4 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0p20 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

The label completion of label input fields was not working. The label completion of the config now uses the labels known to the core to execute the completion.

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