[Users] Layer Container example

[Hugo]

Hello all,

When looking at geoext2 examples abou the tree I see a reference to an
example that is not available. Specifically if you go to
http://geoext.github.io/geoext2/examples/tree/tree.html, on the right side
panel you see a reference to:

"Also see the Layer Container
<http://geoext.github.io/geoext2/examples/tree/layercontainer.html> example
for drag-n-drop support."

I'm currently implementing a tree iun which i would like to have
drad-n-drop support. My problem is that when I drop a node it is being
append in all parentNodes of the tree. Thats why i was curious to see this
example.

Also if you have any suggestion on this subject i would be thankful if you
share your thoughts.

Kind regards,

-- 
Hugo Martins
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