kf5/plasma-framework: backport patch to fix thumbnails in task manager

pkgs/development/libraries/kde-frameworks/plasma-framework.nix

@@ -1,5 +1,5 @@
 {
-  mkDerivation,
+  mkDerivation, fetchpatch,
   extra-cmake-modules, kdoctools,
   kactivities, karchive, kconfig, kconfigwidgets, kcoreaddons, kdbusaddons,
   kdeclarative, kglobalaccel, kguiaddons, ki18n, kiconthemes, kio,
@@ -9,6 +9,14 @@
 
 mkDerivation {
   pname = "plasma-framework";
+  patches = [
+    # FIXME: remove on kf5.96
+    (fetchpatch {
+      name = "fix-thumbnails-task-manager.patch";
+      url = "https://invent.kde.org/frameworks/plasma-framework/-/commit/dff1b034c1162062aa2292099d3d01fc53dafdf6.patch";
+      sha256 = "sha256-0162bi3J5bl5BmmUSrhxxy8MpLtSXkdHGK8wMcS5BB8=";
+    })
+  ];
   nativeBuildInputs = [ extra-cmake-modules kdoctools ];
   buildInputs = [
     kactivities karchive kconfig kconfigwidgets kcoreaddons kdbusaddons