timeline: fix crash on file dialog

env -i HOME="$HOME" DISPLAY="$DISPLAY" WAYLAND_DISPLAY="$WAYLAND_DISPLAY" XDG_RUNTIME_DIR="$XDG_RUNTIME_DIR" ./result/bin/timeline

pkgs/applications/office/timeline/default.nix

···
 , gettext
 , makeDesktopItem
 , copyDesktopItems
+, wrapGAppsHook
 }:
 
 python3.pkgs.buildPythonApplication rec {
···
     sha256 = "sha256-qwH2mt3Va62QJKJGOpt5WV3QksqQaRGEif4CcPC5F2E=";
   };
 
-  nativeBuildInputs = [ python3.pkgs.wrapPython copyDesktopItems ];
+  nativeBuildInputs = [ python3.pkgs.wrapPython copyDesktopItems wrapGAppsHook ];
 
   pythonPath = with python3.pkgs; [
     wxPython_4_2
···
     runHook preCheck
     ${python3.interpreter} tools/execute-specs.py
     runHook postCheck
+  '';
+
+  dontWrapGApps = true;
+
+  preFixup = ''
+    makeWrapperArgs+=("''${gappsWrapperArgs[@]}")
   '';
 
   meta = with lib; {