tdf#90805 sw tables: use veryThin instead of hairline borders

This keeps it consitent with tdf#99027 which was fixed on the
same day.

Change-Id: I03d8a9c2ab1e7f6cf8a7c95d7600d549138e414e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/127165
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <samuel.mehrbrodt@allotropia.de>
Reviewed-by: Justin Luth <jluth@mail.com>
(cherry picked from commit 3807e43b3b1a05eb7d9c88988b41448cfc05015a)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/127183
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
diff --git a/sw/source/core/docnode/ndtbl1.cxx b/sw/source/core/docnode/ndtbl1.cxx
index f300cec..1cb5fc6 100644
--- a/sw/source/core/docnode/ndtbl1.cxx
+++ b/sw/source/core/docnode/ndtbl1.cxx
@@ -930,7 +930,7 @@ void SwDoc::SetTabLineStyle( const SwCursor& rCursor,
        GetIDocumentUndoRedo().AppendUndo(std::make_unique<SwUndoAttrTable>(*pTableNd));
    }

    const SvxBorderLine aHairlineBorder(pColor, SvxBorderLineWidth::Hairline);
    const SvxBorderLine aDefaultBorder(pColor, SvxBorderLineWidth::VeryThin);

    for( auto &rU : aUnions )
    {
@@ -961,10 +961,10 @@ void SwDoc::SetTabLineStyle( const SwCursor& rCursor,
            }
            else if (pColor && !pBorderLine && !pTop && !pBot && !pLeft && !pRight)
            {
                aBox->SetLine(&aHairlineBorder, SvxBoxItemLine::TOP);
                aBox->SetLine(&aHairlineBorder, SvxBoxItemLine::BOTTOM);
                aBox->SetLine(&aHairlineBorder, SvxBoxItemLine::LEFT);
                aBox->SetLine(&aHairlineBorder, SvxBoxItemLine::RIGHT);
                aBox->SetLine(&aDefaultBorder, SvxBoxItemLine::TOP);
                aBox->SetLine(&aDefaultBorder, SvxBoxItemLine::BOTTOM);
                aBox->SetLine(&aDefaultBorder, SvxBoxItemLine::LEFT);
                aBox->SetLine(&aDefaultBorder, SvxBoxItemLine::RIGHT);
            }
            else
            {