Werk #15076: Shorten inventory filter titles

Component	User interface
Title	Shorten inventory filter titles
Date	May 16, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.2.0 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Recently, inventory filter titles were given a prefix, e.g. "Inventory attribute: ", which made them too long for proper display in the filter popup. These prefixes are removed again.

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