* [8.0][mass_mailing] some fixes
* [FIX] rename wrong mailing_type field and add missing fields when creating a mass mailing from the composer
* [FIX] coerce tooltip to an unicode string to avoid a json crash when locale produces a non unicode string for strftime(%B)
* [FIX] repair wrong sql statement computing statistics
[IMP] Location of extra moves should be matched
[IMP] Only one incoterms item
[IMP] Buttons should not be usable by purchase manager that is no stock user
[IMP] Counterpart locations and weights should not be read-only in case of type service, but should simply be invisible as the other fields
[IMP] Change help message package setting
[IMP] Use correct field for showing red lines for late pickings in tree view
[IMP] Add partner_id and invoice control to picking tree
[IMP] Better to have corresponding lates
[IMP] osv/fields.py: improve code change of rev eea07e27
[FIX] calendar: dropdown button misaligned

+ add meaningful placeholder
[IMP] Cleaning of reporting (group_by, filters), adding new favourites and default views, some renaming (py and xml files)
[IMP] test_inherit: add test case, redefine Many2one field in inherited model
Merge pull request #1906 from odoo-dev/8.0-wmsusability-jco

8.0 wmsusability jco: Some usabillity issues and a fundamental issue on the location of extra moves
[FIX] osv/fields.py: fix sum in rev 48dfd70
[FIX] osv/fields.py: fix the fix at rev 43756a24.
[REVERT] web: fixed css of hidden input file: could not click on add attachments anymore

This reverts commit 4e32b9f6f32eea0e4a5bb9d83c5c5f45f775f799.
[FIX] osv/fields.py: enable argument 'obj' in property fields

Fixes #1719
[FIX] web: grid headers should be aligned properly
[FIX] css fix in graph view

The field selection menu was not positioned correctly when there was
a long list.  (was not displayed at the position clicked)