Fix window raising on Wayland

winId() doesn't work there, use windowHandle() instead

CMakeLists.txt

@@ -10,7 +10,7 @@ set (RELEASE_SERVICE_COMPACT_VERSION "${RELEASE_SERVICE_VERSION_MAJOR}${RELEASE_
 project(KHelpCenter VERSION "5.8.${RELEASE_SERVICE_COMPACT_VERSION}")
 
 set(QT_MIN_VERSION "5.15.0")
-set(KF_MIN_VERSION "5.85.0")
+set(KF_MIN_VERSION "5.89.0")
 
 find_package(ECM ${KF_MIN_VERSION} REQUIRED NO_MODULE)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH})

application.cpp

@@ -62,7 +62,7 @@ void Application::activateForStartLikeCall()
 #endif
 
   mMainWindow->raise();
-  KWindowSystem::activateWindow(mMainWindow->winId());
+  KWindowSystem::activateWindow(mMainWindow->windowHandle());
 }
 
 void Application::newInstance()