tdf#153514: try to find exact match, even when searching case-insensitively

Change-Id: Ib3bec382ef80a9078ffde8612c395cb0154fd476
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/146747
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
(cherry picked from commit 2a984c77ccb1aa77d9bbd02218d4dc76aaff4a9e)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/146763
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
diff --git a/sc/source/core/data/stlpool.cxx b/sc/source/core/data/stlpool.cxx
index 5ca89c3..b08b6c2 100644
--- a/sc/source/core/data/stlpool.cxx
+++ b/sc/source/core/data/stlpool.cxx
@@ -408,14 +408,20 @@ ScStyleSheet* ScStyleSheetPool::FindCaseIns( const OUString& rName, SfxStyleFami
    CaseInsensitiveNamePredicate aPredicate(rName, eFam);
    std::vector<sal_Int32> aFoundPositions = GetIndexedStyleSheets().FindPositionsByPredicate(aPredicate);

    ScStyleSheet* first = nullptr; // first case insensitive match found
    for (const auto& rPos : aFoundPositions)
    {
        SfxStyleSheetBase *pFound = GetStyleSheetByPositionInIndex(rPos);
        // we do not know what kind of sheets we have.
        if (pFound->isScStyleSheet())
            return static_cast<ScStyleSheet*>(pFound);
        {
            if (pFound->GetName() == rName) // exact case sensitive match
                return static_cast<ScStyleSheet*>(pFound);
            if (!first)
                first = static_cast<ScStyleSheet*>(pFound);
        }
    }
    return nullptr;
    return first;
}

void ScStyleSheetPool::setAllParaStandard()