Collective-contact-plonegroup

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- Added `collective.contact.plonegroup.every_organizations` vocabulary, to do
this needed to write `BaseOrganizationServicesVocabulary` from which
`OwnOrganizationServicesVocabulary` and `EveryOrganizationsVocabulary`
inherits.
[gbastien]
- Removed sorting on term title for
`collective.contact.plonegroup.selected_organization_services`, terms are
displayed following selection order in plonegroup organizations like before.
Added new vocabulary sorted on term title and available as
`collective.contact.plonegroup.sorted_selected_organization_services`.
[gbastien]

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- Optimized `OwnOrganizationServicesVocabulary.listSubOrganizations`, do the
catalog query only if current organization contains something.
[gbastien]

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- In `OrgaPrettyLinkWithAdditionalInfosColumn`, set `showContentIcon` to True
and enable `link-tooltip`.
[gbastien]
- In `SelectedInPlonegroupColumn`, display `Not` in bold.
[gbastien]
- Added `collective.contact.plonegroup.functions` vocabulary listing every
functions defined in plonegroup control panel.
[gbastien]

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- Corrected bad full title shortening.
[sgeulette]

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- Fixed error in `OrgaPrettyLinkWithAdditionalInfosColumn` when displaying
organizations out of `PLONEGROUP_ORG`.
[gbastien]
- Fixed `utils.get_organizations` when `caching=True` to store a new list of
organizations in the cache instead returned value or value in cache may be
modified if we modify returned value in a sub method...
[gbastien]
- Use `get_registry_organizations/set_registry_organizations` and
`get_registry_functions/set_registry_functions` as much as possible.
[gbastien]

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- Fixed problem, linked Plone groups title were not updated when suffix title
changed and some `fct_orgs` were defined.
[gbastien]
- In `settings.detectContactPlonegroupChange`, set `changes = True` only when
relevant, due to wrong indentation, it was done systematically.
[gbastien]