select entire column, not just text-occupied portion

making this consistent with ListBox

Change-Id: Ifa2fd7070f95232fca8aa129e107ef5adf32e3df
Reviewed-on: https://gerrit.libreoffice.org/62907
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

vcl/source/window/builder.cxx

@@ -1836,6 +1836,7 @@ VclPtr<vcl::Window> VclBuilder::makeObject(vcl::Window *pParent, const OString &
         {
             VclPtrInstance<SvTreeListBox> xBox(pRealParent, nWinStyle);
             xBox->SetNoAutoCurEntry(true);
+            xBox->SetHighlightRange(); // select over the whole width
             xWindow = xBox;
         }
         if (pRealParent != pParent)