Motivation for this change

It looks like konqueror isn't packaged?

NOTE: I need some help testing this. It doesn't seem to always have the correct DPI, and is missing icons, but that may just be because of other local changes or my DE/WM setup at the moment. (I'm changing things up and not sure Qt apps are working correctly right now).

So if someone else can test and let me know, that would be helpful.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• [sorta] Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Fits CONTRIBUTING.md.