Lintian tag information: desktop-entry-invalid-category (type: warning)

Description (from lintian-explain-tags)

This desktop entry shows a category that is not among the registered
"main" or "additional" categories in the FreeDesktop specification.

The values are case-sensitive. Whitespace is only allowed just before and
after the equals sign in the Category key, and nowhere else.

The desktop-file-validate tool in the desktop-file-utils package is useful
when checking the syntax of desktop entries.

Please refer to
https://specifications.freedesktop.org/menu-spec/latest/apa.html for
details.

Visibility: warning
Show-Always: no
Check: menu-format

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