mozo: Some desktop menu entries are not sorted alphabetically

Upstream

• Issue: https://github.com/mate-desktop/mozo/issues/43
• Proposed solution (guix): https://github.com/mate-desktop/mozo/pull/86/files

Describe the problem

Trisquel 7 to 11.0.1:

• Internet: Abrowser, Pidgin Internet Messenger
• Office: LibreOffice Writer, LibreOffice Draw
• Places:
  • Folders: Home Folder, Downloads
  • "Connect Server..." is sorted before Network
• System:
  • Administration is sorted before Preferences
  • About MATE is sorted before Help