Werk #10049: Background job overview: Only list job types with existing job entries

Component	Setup
Title	Background job overview: Only list job types with existing job entries
Date	Sep 18, 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 1.6.0 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

The "Background jobs overview" of WATO is now only listing the job types that currently have at least one job entry to visualize.

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