rich:panel do not render its surplus tags in VPE

Problem:
On server rich:panel renders unwanted elements for instance additional footer facet in panel's content. But VPE does NOT show elements that are not allowed by richfaces tag specification.

Solution:
Show surplus tags in VPE for rich:panel.

Example:
<rich:panel>
<f:facet name="header">
PHead111
<h:outputText>PanelHeader1</h:outputText>
<h:outputText>PanelHeader2</h:outputText>
<h:outputText>PanelHeader3</h:outputText>
<span>P1Head</span> PHead
</f:facet>
<f:facet name="footer">
<h:outputText>Col 1 footer3</h:outputText>
<span>COL1FOOT</span> C1FText
FooterFacet
</f:facet>
Panel Content
</rich:panel>

Behaviour:
Text "COL1FOOT C1FText FooterFacet" should be rendered in the panel's content.