[FIX] config.py: do not use appsdir to define the user's data dir when he has no home directory on unix

Force it to be '/var/lib/(appname)' in this case

When a relational field is assigned in an onchange, its inverse field is
updated in cache.  Reading the current value of the inverse field may be
costly, for instance in the case of a one2many field with thousands of records
as a value.  Instead, put in cache a SpecialValue that reads and updates the
field; it will be triggered only when it is accessed.

When reading a one2many field, the inverse mapping of the lines (matching m2o -> lines of corresponding record) was instantiating each line and then triggering the prefect of fields.
To improve the performances, the inverse mapping is done in sql to avoid triggering the prefetching.

incomplete, incorrect, committed for testing

[FIX] account, bank statement reconciliation: fixed use cases involving transactions made in a different currency than the company AND the statement ones

[FIX] survey: trace the partner_id taking the survey; if no token, set as the current user's partner.

[IMP] sales_team: Force a tree view in Sales team tab to avoid to show unnecessary informations like last login date

[IMP] sales_team: remove widget many2many_kanban from "Team Members" tab. Need to fix the security check from many2many_kanban before to reuse-it. Was checking delete user, and not write sale_team when we were tyring to delete a sale_men (user) from member_ids.

[FIX] account, bank statement reconciliation: payment and invoice in foreign currency use case fixed

[FIX] crm: lead_to_opportunities, check that current active_id has not been already merged by another previous active_id. Else, we was trying to browse an lead which was already deleted by a previous merge in the same loop.

fix typo on undeclared variable xml_id

needs fixes, and corresponding web client reference

* fix some docstrings so they can be autodoc'd
* intersphinx mapping (and links to) werkzeug and python

Split the ternary field application in active and show_customize, all four
possible value are now needed for the customize theme popup.

[FIX] account: fixes of bank statement reconciliation widget. Add of a partner_name field to hold the name of the counterparty in case it is not detected instead of merging it to the communication. Structured communication goes in the same communication field, while reference field holds the reference of the transaction (for whatever that means)"

[FIX] crm: onchage user_id, don't use the uid by default, but user the user_id. Else Saleteam are setted for current user who are editing and not salesman assigned. + Fix disintct name for attachment

To browse the forum post, as the partner of the create_uid of the post is needed, which can't be read by portal users.

[IMP] mail: various cleaning and fixes in the notification email links (wording, missing document name management)

[FIX] mail: invite: name of the document was missing in the link to access the document, leading to 'Access False'.

[FIX] mail: chatter: display blockquotes with normal font size (appearing for example when replying through thunderbird).

record rules.

Partial revert of commit 80017b04.

Conflicts:
	addons/web/static/src/js/chrome.js

[FIX] translations loading for selection fields in website

This was added as a security check, but access to this field is need by the wizard itself.
As non employee users can't read/create email templates, this will not be problematic