Make line color consitent between CategoryListBox and simple ListBox

Line color is changed in CategoryListBox::UserDraw() method so we
need to explicitely specify it here too.

Change-Id: Ia3dcbf70e0a53cfba16d5d2df0fc2e4d7e23ad71
Reviewed-on: https://gerrit.libreoffice.org/47083
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
diff --git a/vcl/source/control/imp_listbox.cxx b/vcl/source/control/imp_listbox.cxx
index 279a178..9470e9a 100644
--- a/vcl/source/control/imp_listbox.cxx
+++ b/vcl/source/control/imp_listbox.cxx
@@ -1699,6 +1699,7 @@ void ImplListBoxWindow::ImplPaint(vcl::RenderContext& rRenderContext, sal_Int32 
    {
        rRenderContext.SetTextColor(!IsEnabled() ? rStyleSettings.GetDisableColor() : rStyleSettings.GetHighlightTextColor());
        rRenderContext.SetFillColor(rStyleSettings.GetHighlightColor());
        rRenderContext.SetLineColor();
        rRenderContext.DrawRect(aRect);
    }
    else