[FIX] leftover of commit 790312dbf92e302f40782a60c5dc208cd6877079wq
[IMP] website_twitter: authentication error popup with proper description based on twitter error codes and responses

[CLEAN] website_twitter: some linting in twitter_config.py file (indentation
errors, imports to remove, spacing issues).
[IMP] membership: usability

- new help tip when there are no members
- allow to search for members and tags
- move reporting to "Reporting" menu
[IMP] crm: default filter is 'not dead' instead if 'unassigned' and displays an info message in the crm.stage form view. Dead leads should'nt be included in the default view since they can pollute the view over time. Instead, a filter for all leads (except the dead ones) is used by default. A small info message inform the user that the "dead" status is equivalent to setting probabilities to 0 and to fold the stage in kanban for a crm.stage.
[IMP] Propagate cancel should be done for multiple procurements at once
[IMP] Add purchase order optimization

Remove purchase/schedule date of cadencier + group.  Should work through inheritance in stock_calendar.
[IMP] Use group propagation options from procurement rule
[IMP] optimize purchase order cancellation + date_planned on poline datetime
[IMP] Optimize orderpoint stock get + traversal of procurement subtraction + change edi format test date_planned to datetime

[IMP] Make sure dropship route can be chosen (takes prio)
[IMP] Add stock_calendar module and adapt the resource module to contain some necessary changes

Update views for date_to on calendars

[IMP] Will add a date_to in the calendar attendance and date_from and date_to should be applied/ check backwards also
[IMP] get_attendance_for_weekday will pass date instead of weekday

[IMP] should assign correct procurements in run
[IMP] Add group on leave

[IMP] interval_remove_leaves everywhere instead of interval_remove_leaves_groups once

[FIX] Add cr, uid in test
[IMP] Clean and inherit purchase and delivery dates + message_post one by one + float_compare in orderpoints + use next_by_code instead of get for sequence

[FIX] Message_post happens one by one and add test for next delivery date

[IMP] Add float_compare in orderpoint confirm

[FIX] Typo

[FIX] Use next_by_code instead of deprecated get
[IMP][website_mail] improved template designer, added support for background color, font color and bootstrap buttons(inline css) in mail designer,removed other snippet, changed snippet according to new format,added theme selector in mail_designer, lodeded snippets dynamically based on theme, added font-awesome support in mail snippets, added one controller which convert font-awesome to icon

[IMP][website_mail] changed less colorpicker to inline ckeditor color picker

[IMP][website_mail] Improved discount coupon and image text snippets