[FIX] product: redo forward port 2832d2d for fix 12eb157 lost with 43977de
[FIX] product: use new api to retrieve product standard price as SUPERUSER

As it looks like self is a product.template, and product can be a product.product. Using the new api avoid to have this problem.
[FIX] email_template: do not try to add user signature if none set

append_content_to_html expects two strings. If the user has no signature, it returns user.signature returns False
[FIX] point_of_sale: fixed display of untaxed amount in sales lines report
[FIX] point_of_sale: fixed display of untaxed amount in sales lines report
[MERGE] forward port of branch 7.0 up to 75d3ea6
[FIX] website_quote: compare untaxed amounts in case of discount
[MERGE] forward port of branch saas-3 up to db75994
Merge pull request #3001 from Bubbles-IT/8.0-fix-pos-tax-label

[FIX] point_of_sale: printing of tax name on hardware was missing name
[FIX] models: do not look up the registry class when building cls._fields
[FIX] implementation of t-call's 0-index in qweb-js

Had expected regularity, had not noticed the Python version is really an
ignoble hack where the string "0" (exactly) is interpreted in a specific
manner when used in t-raw and format strings, *and nowhere else*.

Had special-cased the expression everywhere which broke e.g.
<t-set="xxx" t-value="0"/>. Reproduce Python behavior more closely,
and strongly consider swapping out both for something different e.g.
[[content]] or something like that, which doesn't cause problems in
Python but doesn't have to be so specially cased either.
[FIX] website: editor: preserve label and color for link buttons targeting a page

When selecting a page target rather than a static
URL the style and label information were ignored/lost.
[FIX] web: push render value deferred only if the field is in a form view
[FIX] mail_thread: allow to pass mail_track_log_only in the context to remove the subtype of the notification. By this way, no mails will be sent because partners_to_notify will be empty.
[FIX] web: even if there is no view, the field has to be rendered

This is related to ÿ07f3f4d9206d4c1a3e484eb89f09d2258977a
[FIX] product: correct name_get for products with resellers.

Error introduced during forward-port commit 14f3085
[FIX] Currency_id on purchase requisition + move created from procurement should go to location of procurement not of rule (procurement location can be child of rule location.  In handy for customer locations)

[FIX] Other elements of purchase of purchase requisition

[IMP] Picking type on purchase requisition

[FIX] Location of purchase
Merge pull request #3081 from odoo-dev/8.0-wmsprocmoveloc-jco

[FIX] Currency_id on purchase requisition + move created from procuremen...
[FIX] web: cherry-pick of 893e4268650ddd517e3044f41c582fd92de6edfe & 61207f3f4d9206d4c1a3e484eb89f09d2258977a
[IMP] sale,warning: usability