fdo#86708 paint after Undo of Sort

Regression of 10fc138307afb4b39baddb0d56eb8e986e5d29ea that exchanged
the PostPaint with SetDirty, but the paint is also needed.

Change-Id: Ic3e81fa106f405568effaed71ab33b575b4c5c5c
(cherry picked from commit 5cec4ea827570a5bb0a368025f3733b841107d07)
Reviewed-on: https://gerrit.libreoffice.org/13122
Reviewed-by: Kohei Yoshida <libreoffice@kohei.us>
Tested-by: Kohei Yoshida <libreoffice@kohei.us>
diff --git a/sc/source/ui/undo/undosort.cxx b/sc/source/ui/undo/undosort.cxx
index 4a00707..f86bdc2 100644
--- a/sc/source/ui/undo/undosort.cxx
+++ b/sc/source/ui/undo/undosort.cxx
@@ -49,6 +49,9 @@ void UndoSort::Execute( bool bUndo )
    rDoc.SetDirty(maParam.maSortRange);
    if (!aParam.mbUpdateRefs)
        rDoc.BroadcastCells(aParam.maSortRange, SC_HINT_DATACHANGED);

    pDocShell->PostPaint(maParam.maSortRange, PAINT_GRID);
    pDocShell->PostDataChanged();
}

}