Quantity unit was not defined in default supply property sheet, so the
fields were created local properties, because the accessors were not
existant. This change make the accessors for quantity unit on default
supply lines generated.

The implementation details is that it replaces priced_quantity, which was
defined twice

See 09e0bbcf

erp5_smart_assistant and erp5_travel_expense have cross looping dependencies.
Install both bt5 for the tests, but the real fix would be to clean up those bt5.

See merge request nexedi/erp5!1494

Update local frontend slave with backend balanver's IPv6 address if Test Suite is configured to use a local frontend slave. This allows a develop to use a local frontend (possible in same machine) and avoid network effect from generated test results.

See nexedi/erp5@1b5e3c72

See nexedi/erp5@1a807abb which removes one translated string

Stabilize random failures

Add some assertElementPresent right after the waitForElementPresent to stop the stop in case of missing element.

This page gathers all informations linked to the current user: preference, person, language, logout.

Drop all other language/preference links from other gadgets.

Drop user informations from language page

Firefox disables IndexedDB in private mode.
Use memory storage in such case. This allows user to have a normal erp5js usage until the window is reloaded.

See merge request !1493

1.use query factory instead of manually query
2.don't get all related object, use modification date to filter
3.synchronize only related service