[ic] tree tag: Keep first level visible

[interchange-users@interchange.redhat.com (Kaare Rasmussen)]

Answering my own question:

> I'd like to always keep the first level visible with the tree tag. How do I
> do that?

This does the trick:

[calc]%{$Scratch->{memo}}->{1}=1;return[/calc]

to be placed just before the [tree] tag.

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