Domino Designer / : Collapsable xPages code

It would be great to make collapsable the xPages code in the editor, like when you view an xml in Firefox.

Present a + / - sign at the block starting element and if you click on this, the block is closing or expanding. this makes the code more readable and easy to edit

like:

 

-<xc:mRectangleEntry>
         -<xp:this.facets>
                 -<xp:panel xp:key="rectangleEntryContent">
                      -<xp:text>
                                           
                        </xp:text>
                 </xp:panel>
             </xp:this.facets>
</xc:mRectangleEntry>

 

to this