asn1editor: add wrapGAppsHook3 to fix file dialog crash

Without wrapGAppsHook3 the application terminates like this when
navigating to "File -> Open ASN.1 specification":

  (asn1editor:1178773): GLib-GIO-ERROR **: 14:08:42.730: Settings schema 'org.gtk.Settings.FileChooser' is not installed
  Trace/breakpoint trap      (core dumped) ./result/bin/asn1editor

pkgs/by-name/as/asn1editor/package.nix

@@ -2,6 +2,7 @@
   lib,
   python3,
   fetchFromGitHub,
+  wrapGAppsHook3,
 }:
 
 python3.pkgs.buildPythonApplication (finalAttrs: {
@@ -18,6 +19,7 @@ python3.pkgs.buildPythonApplication (finalAttrs: {
 
   build-system = with python3.pkgs; [
     setuptools
+    wrapGAppsHook3
   ];
 
   dependencies = with python3.pkgs; [