Plone-formwidget-contenttree

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* Make placeholder terms for hidden / missing items, so that you can still see
something in the editing interface and not accidentally remove them. Ideally
we should say if a page is invisible or missing, but not today.
[lentinj]

* Use javascript function from plone.formwidget.autocomplete to add new input
boxes, make javascript as clone-safe (when making new rows in datagridfield)
as possible
[lentinj]

* Just use full widget name in ++widget++ URL, don't try and strip form prefix
off. If within a subform, this is the wrong thing to do and the traverser now
supports stripping the initial 'form.widgets'
[lentinj]

* Workaround for sources being used without being bound first.
[lentinj]

* Check the request for context before falling back to getSite()
[lentinj]

* Add a UUIDSource that stores plone.uuid pointers to content.
[lentinj]

* Use tokens as full URL of content, move all token<->value operations into the
source. Rename methods so that actually-public methods have public names
[lentinj]

* Alter terms so that token is the full path to an item, value is the path
without portal_url that is stored in the DB. This means all the path parsing
can be kept within the source.
[lentinj]

* _filter is used outside the source, so not an internal helper function
anymore.
[lentinj]

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* Made compatible with Plone 4.1 by loading the permissions.zcml from
Products.CMFCore (only when plone.app.upgrade is available, to keep
compatibility with Plone 3, if we currently have that).
[maurits]

* Improved CSS for selected items to make them more evident in the Sunburst
theme.
[davisagli]

* Add content type CSS class to items in the navtree so that icons are shown
in Plone 4.
[davisagli]

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* Use `zope.i18n.translate` instead of translation_service, since
translation_service was removed in plone4.
[jbaumann]

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* Fall back to the site to perform content-related operations if the
context is not wrapped into an acquisition chain.
[dukebody]

* Compute the view name as the request URL left-stripped the content
absolute URL.
[dukebody]

* Make it possible to restrict the field to objects below a path
The constructor of ObjPathSource takes a path keyword argument
with a PathIndex catalog query. This argument filters objects
outside of this path. If the navigation_tree_query does not have
a path argument, the path is also copied into this query.
[gaudenzius]

* Update widget in the contenttree-fetch browser view
The widget.update() call rebinds to source which previously
was only bound during traversal. This avoids problems with
sources that only work after security is applied.
[gaudenzius]

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* Adjusted styles so the widget looks reasonable with Plone 4's sunburst theme.
[davisagli]

* Fix icons in CMF 2.2. This closes
http://code.google.com/p/dexterity/issues/detail?id=111
[davisagli]

* Make the widget work properly on Zope 2.12
[optilude]

* Add a template for HIDDEN_MODE.
[csenger]

* Convert all strings in a new navtree node into unicode using the site
encoding to render non-ascii characters in the widget.
[csenger]

* Added message IDs for translations and added locales directory with
german translations.
[jbaumann]

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* Don't filter children of non-queriable parent types (e.g. Large Plone
Folders).
[optilude]