Fixes for D27959

Fixes issues that flew under the radar in D27959, namely:
- Missing KWindowInfo flags
- Returning service name instead of object path

Reviewed-By: kbroulik

libtaskmanager/xwindowtasksmodel.cpp

@@ -50,7 +50,7 @@ namespace TaskManager
 static const NET::Properties windowInfoFlags = NET::WMState | NET::XAWMState | NET::WMDesktop |
     NET::WMVisibleName | NET::WMGeometry | NET::WMFrameExtents | NET::WMWindowType | NET::WMPid;
 static const NET::Properties2 windowInfoFlags2 = NET::WM2DesktopFileName | NET::WM2Activities |
-    NET::WM2WindowClass | NET::WM2AllowedActions;
+    NET::WM2WindowClass | NET::WM2AllowedActions | NET::WM2AppMenuObjectPath | NET::WM2AppMenuServiceName;
 
 class Q_DECL_HIDDEN XWindowTasksModel::Private
 {
@@ -476,7 +476,7 @@ QString XWindowTasksModel::Private::appMenuServiceName(WId window)
 QString XWindowTasksModel::Private::appMenuObjectPath(WId window)
 {
     const KWindowInfo *info = windowInfo(window);
-    return QString::fromUtf8(info->applicationMenuServiceName());
+    return QString::fromUtf8(info->applicationMenuObjectPath());
 }
 
 QIcon XWindowTasksModel::Private::icon(WId window)