Collective.eeafaceted.collectionwidget

-----------------

- Added `ram.cache` for `CollectionCategoryVocabulary` to avoid query at each
request as query is using a `sort_on=getObjPositionInParent` which is very slow.
[gbastien]
- Override `DashboardCollection` query computation that by default in
`plone.app.contenttypes` and `plone.app.querystring` will arbitrary add a `path`
index in the query, and again, the `path` index is very slow and just not necessary.
[gbastien]
- Use unrestricted catalog query when possible.
[gbastien]
- Optimized the catalog query that compute the `number_of_items` counters.
[gbastien]

-----------------

- Added `real_context` parameter to `CollectionVocabulary`.
[sgeulette]
- Use `ITALCondition` behavior to evaluate the `tal_condition` expression so
`ITALCondition.complete_extra_expr_ctx` is taken into account.
[gbastien]

-----------------

- Invalidate `collective.eeafaceted.collectionwidget.cachedcollectionvocabulary`
if `portal_url` changed, this can be the case when application is accessed
by same user from different URi.
[gbastien]

----------------

- Added parameter `raise_on_error=True` to `utils._get_criterion` so it will
return `None` in case passed context is not a faceted context instead
raising an error.
[gbastien]

----------------

- Do not store the collection object in `term.value` of vocabulary
`CollectionVocabulary` because it can be ram cached
(in `CachedCollectionVocabulary` for example) and ram caching methods
returning objects is a bad idea.
[gbastien]
- Added `caching=True` parameter to `utils.getCurrentCollection` so it is
computed one time by request for a given `faceted_context`.
[gbastien]

----------------

- Added parameter RenderTermView.compute_count_on_init, True by default that
will do the collections count be computed when the widget is rendered. This
makes it possible to disable it.
[gbastien]
- Fix an issue with the widget used in combination with collective.solr
[mpeeters]
- In `utils._updateDefaultCollectionFor` use `ICriteria.edit` to change value
as it handles persistence instead doing it ourselves.
After value is changed, trigger `FacetedGlobalSettingsChangedEvent`.
[gbastien]