Missing menu entry to launch kicad

[eduardosm]

Describe the bug
kicad is missing a menu entry to launch the application.

To Reproduce
Steps to reproduce the behavior:

1. Install kicad

Expected behavior
There should be a menu entry to launch the application.

Notify maintainers

@evils @bgamari

Metadata

- system: `"x86_64-linux"`
 - host os: `Linux 5.9.12, NixOS, 21.03pre257339.83cbad92d73 (Okapi)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.9`
 - channels(root): `"nixos-21.03pre257339.83cbad92d73"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[evils]

see #104381 (probably shouldn't have been closed)