menulibre (advanced FreeDesktop.org compliant menu editor)

menulibre is an advanced menu editor that provides modern features in
a clean, easy-to-use interface.

It allows you to create or modify launchers, add, remove and adjust
desktop actions and rearrange menu items.

NOTE: python-distutils-extra needs to be built with python3
support by passing PYTHON3=yes ./python-distutils-extra.SlackBuild when
building.