ibus-engines.table: fix after update of settings infrastructure

Fixes #56621. Adds a wrapper to deal with gsettings, and includes a hack to make
things actually work (postFixup).

pkgs/tools/inputmethods/ibus-engines/ibus-table/default.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub
 , autoreconfHook, docbook2x, pkgconfig
 , gtk3, dconf, gobject-introspection
-, ibus, python3 }:
+, ibus, python3, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
   name = "ibus-table-${version}";
@@ -33,14 +33,24 @@ stdenv.mkDerivation rec {
     dconf gtk3 gobject-introspection ibus (python3.withPackages (pypkgs: with pypkgs; [ pygobject3 ]))
   ];
 
-  nativeBuildInputs = [ autoreconfHook docbook2x pkgconfig python3.pkgs.wrapPython ];
+  nativeBuildInputs = [
+    autoreconfHook
+    docbook2x
+    pkgconfig
+    python3.pkgs.wrapPython
+    wrapGAppsHook
+  ];
 
   postUnpack = ''
     substituteInPlace $sourceRoot/engine/Makefile.am \
       --replace "docbook2man" "docbook2man --sgml"
   '';
 
-  postFixup = "wrapPythonPrograms";
+  postFixup = ''
+    wrapPythonPrograms
+    sed -e 's/LookupTable/LookupTable.new/' \
+        -i "$out/share/ibus-table/engine/table.py"
+  '';
 
   meta = with stdenv.lib; {
     isIbusEngine = true;