firewalld: don't depend on nm-connection-editor

pkgs/by-name/fi/firewalld/nm-connection-editor.patch

@@ -0,0 +1,19 @@
+--- a/src/firewall-applet.in
++++ b/src/firewall-applet.in
+@@ -59,14 +59,8 @@
+ 
+ NM_CONNECTION_EDITOR = ""
+ for binary in [
+-    "/usr/bin/systemsettings",
+-    "/bin/systemsettings",
+-    "/usr/bin/nm-connection-editor",
+-    "/bin/nm-connection-editor",
+-    "/usr/bin/kde5-nm-connection-editor",
+-    "/bin/kde5-nm-connection-editor",
+-    "/usr/bin/kde-nm-connection-editor",
+-    "/bin/kde-nm-connection-editor",
++    "/run/current-system/sw/bin/systemsettings",
++    "/run/current-system/sw/bin/nm-connection-editor",
+ ]:
+     if os.path.exists(binary):
+         NM_CONNECTION_EDITOR = binary

pkgs/by-name/fi/firewalld/package.nix

@@ -12,14 +12,12 @@
   intltool,
   ipset,
   iptables,
-  kdePackages,
   kmod,
   libnotify,
   librsvg,
   libxml2,
   libxslt,
   networkmanager,
-  networkmanagerapplet,
   pkg-config,
   python3,
   qt6,
@@ -63,7 +61,8 @@ stdenv.mkDerivation (finalAttrs: {
     ./specify-localedir.patch
 
     ./gettext-0.25.patch
-  ];
+  ]
+  ++ lib.optional withGui ./nm-connection-editor.patch;
 
   postPatch = ''
     substituteInPlace config/xmlschema/check.sh \
@@ -73,11 +72,6 @@ stdenv.mkDerivation (finalAttrs: {
         substituteInPlace $file \
           --replace-fail /usr "$out"
     done
-  ''
-  + lib.optionalString withGui ''
-    substituteInPlace src/firewall-applet.in \
-      --replace-fail "/usr/bin/systemsettings" "${kdePackages.systemsettings}/bin/systemsettings" \
-      --replace-fail "/usr/bin/nm-connection-editor" "${networkmanagerapplet}/bin/nm-connection-editor"
   '';
 
   nativeBuildInputs = [