Werk #13895: Improve event console history filtering performance

Component	Event Console
Title	Improve event console history filtering performance
Date	Jul 15, 2022
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.1.0p7 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

By handling case-sensitivity in the filter expressions more correctly, the performance of event console history filters has been improved for various cases.

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