Odoo Release Updates

[FIX] timesheet_grid: correct unavailability with flexible hours

[IMP] web_enterprise, *: use inputbox design

[FIX] timesheet_grid: add missing super call in _onchange_project_id

[IMP] *: remove unnecessary button "Discard" labels

[REM] *: all traces of pytz

[IMP] timesheet_grid: add activity-based timesheets assistant

[FIX] */__manifest__.py: websites

[CLN] *: manifests

[FIX] *: automaticaly set legacy at_install

[IMP] hr: moving Mitchell Admin to demo data

[FIX] timesheet_grid: correctly update the timesheet grid timer button

[FIX] timer,timesheet_grid: stop timer even if inside another company

[FIX] timesheet_grid: replace deprecated z-index-*

[IMP] resource: refactor working schedule

[IMP] *: Add grid view to work entries

[FIX] timesheet_grid: prevent use of falsy id in rpc call

[REF] *: use ir.config_parameter new API get_xxx, set_xxx

[FIX] timesheet_grid: move timesheet domain into helper method

[REF] hr: merge hr_org_chart into hr

[FIX] industry_fsm: allow normal tasks in project templates

[FIX] helpdesk_timesheet, timesheet_grid: merge timesheets linked to helpdesk ticket

[FIX] timesheet_grid: keep edited timesheet value in list view

[FIX] timesheet_grid: don't mark weekends in gray

[REV] industry_fsm, industry_fsm_sale : revert task template refactor

[IMP] web: revamp of the notification

[IMP] *: improve UI of the preferences form and user form for admin

[IMP] timesheet_grid: remove dead code