tdf#168132 Make sure ranges do not show as disabled in Calc's

External Data dialog

Change-Id: I5cc64cea920f778e33f0a3e28e082839ceb8314a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/197509
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
Tested-by: Jenkins

sc/source/ui/miscdlgs/linkarea.cxx

@@ -263,8 +263,10 @@ void ScLinkedAreaDlg::UpdateSourceRanges()
 
     m_xLbRanges->thaw();
 
-    if (m_xLbRanges->n_children() >= 1)
+    if (m_xLbRanges->n_children() >= 1) {
         m_xLbRanges->select(0);
+        m_xLbRanges->set_sensitive(true);
+    }
     else
     {
         m_xLbRanges->append_text(ScResId(STR_NO_NAMED_RANGES_AVAILABLE));