title: p:dataTable with scrollable and one frozen column but scroll not coming
body: <p>there is a <code>p:dataTable</code> with <code>scrollable="true</code>" <code>frozenColumns="1"</code> in <code>h:panelGroup</code>, and on page load the panelGroup has <code>display:none</code>. On clicking a button the property is changed to <code>display:block</code>. But the scroll does not appear now. But if i keep <code>display:block</code> on page load, things work fine.</p>