…account moves.

…n community addons

* Adds better description and docstring to account_account methods

* Add security group to show account_account notifications

…outdented

Images in the README file now point to the ones located in the module,
and docstring was improved to explaing why manual tracking is required.

Migration standard

This reverts commit a7e4b8c.

The "hidden" category is used for thechnical groups (the ones enabled/disabled
for all users), which is not the case for the account chatter group.

* Change category group to avoid conflicts with account group

<img width="880" alt="Screen Shot 2021-09-16 at 11 06 09 PM"
src="https://user-images.githubusercontent.com/16024775/133727633-83798393-6c92-40b0-9933-ab560faa11a8.png">

<img width="930" alt="Screen Shot 2021-09-16 at 11 13 25 PM"
src="https://user-images.githubusercontent.com/16024775/133728255-e83fcf01-1788-48a5-b247-19def7d3801d.png">

- Add tracking to allowed_journal_ids field in account.account model.

- This change is because in 15.0 the account.account model has
  tracking to some fields, so is not necessary the mail.thread inherit
  and overwrite the fields to add tracking.

- Add admin and root users as default on the group `group_show_account_chatter_notifications`.

To be able to show chatter only to certain users, we:
- Hide chatter for everywhere by removing it
- Re-introduce it only for the specific group

However, the new chatter is missing the activity widget, which was
already present on the removed one.

This atts missing activity widget to journal and journal entries, and
improve accounts by adding it also there.

In addition, journal entry's chatter was being placed on  a wrong
position, before attachments preview instead of after it.

group

- Show account.account chatter only for the group
  "group_show_account_chatter_notifications"

Even though an initial migration was already performed, module was
still not working.

Code was re-written to be cleaner and less intrusive to the tracking
mechanism.

- W7902(duplicate-xml-record-id).

Python headers were removed from python files

Due to the inability to add groups to inherited views in v16, the views
in this module were refactored so they would still function as intended

… text

This module reassigns the narration field type, from html to text, that
was wrong because when the field being refereced from a related field
following error appears

	TypeError: Type of related field bank.rec.widget.st_line_narration is
	inconsistent with account.move.narration

So we remove the field inheritance, because the only reason this field
was inherited was to make it trackeable, which is not supported for
HTML fields.

This commit adds tracking to several fields across the `account_account`, `account_journal`, and `account_move` models.

In `account_account`, tracking was added to the `non_trade` field.

In `account_journal`, tracking was added to `account_control_ids`, `refund_sequence`, and `restrict_mode_hash_table` fields.

In `account_move`, tracking was added to `company_id`, `fiscal_position_id`, `auto_post`, and `auto_post_until` fields.

These changes will help keep a better record of modifications to these fields.