Changed focus to the first document of the geometry.

Right now I have up to 15 documents attached to each geometry and therefore I
have to scroll up again and again.
Removed closure from shape-click callback.

It takes a little longer than its predecessor but performance isn't a big issue
for a singular click and the memory footprint is way smaller.
Moved prepend(item.tr) into timer function.

Because FF31 shows a small delay between prepending the item and focusing it.
It looks stupid.
Re-introduced explanation lost in the previous commit.
Re-grouped some elements of the #export form.