Resolves: tdf#116116 vertically center line in allocated height

Change-Id: Iee4cd859cdc52a2272f5b01c3e4a57336cc336a4
Reviewed-on: https://gerrit.libreoffice.org/50881Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sfx2/source/dialog/dinfdlg.cxx

@@ -1750,6 +1750,7 @@ void CustomPropertiesWindow::CreateNewLine()
     pNewLine->m_aValueEdit->SetAccessibleName(m_pHeaderAccValue->GetText());
 
     sal_Int32 nPos = GetExistingLineCount() * GetLineHeight();
+    nPos += LogicToPixel(Size(0, 2), MapMode(MapUnit::MapAppFont)).Height();
     m_aCustomPropertiesLines.push_back( pNewLine );
 
     SetWidgetWidths(pNewLine);