Werk #14144: Add timestamp to time filter options

Component	User interface
Title	Add timestamp to time filter options
Date	Jun 8, 2022
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

You can now filter time by timestamps with format YYYY-MM-DD HH:mm:ss

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