Werk #11900: Avoid duplicate display for extension packages

Component Core & Setup
Title Avoid duplicate display for extension packages
Date Dec 22, 2020
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.1.0i1 2.0.0b4
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

This fixes the case where mkp find shows the same file under multiple categories.

This also fixes the same error in the UI for the "Extension packages" display.

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