With this improvement, new tools for massive schedules mark as finished
are added.

And, when logistics_planning_mgmt_weight is installed,
schedule inputs are not automatically marked as finished when a ticket
(move) is selected, so massive marking schedules as finished becomes
important.

…hods

Some onchange methods had write() calls within, that could lead to
unexpected results. In that cases we should use dot (".") notation or
update() calls.

Features added:
* New Schedules Invoicing menu for Account users.
* This menu shows both input and output invoiceable schedules.
* For one (with a custom button) ore more schedules invoice action is available.

With this improvement, it's possible to duplicate those logistics
plannings manually created. Some of the fields were reset anyway (like
state, linked stock move, invoicing, etc). Parametrized multi
duplication is allowed (selecting a certain number of schedules to be
duplicated, with a custom limit that prevent a user error selecting
"Duplicate" action when it wasn't intended to).

…voice line

This improvement enables by default grouping selected logistics schedules
to be invoiced in the same line if some of them shares the same values,
making aggregation according price unit type expected behavior.

Grouping criteria by:
- product (replacing account, that is not available at this point)
- analytic account
- product unit of measure
- price unit type
- (OPT) price unit

When aggregating,
- If product unit of mesure is 'trip' => adding to price unit
- If product unit of mesure is 'unit' => adding to price qty

…unt issues

This commit fixes the following bugs:
* When an invoice was duplicated, related schedules were also linked to
  the new invoice. A schedule cannot be linked to more than an invoice
  line.
* When a draft invoice with linked schedules was deleted, every
  schedule was unlinked as well (ok), but the same didn't occur when
  a single invoice line was removed. Now, such check is made at invoice
  line level.
* Invoice schedule count became wrong when lines with linked schedules
  were remove.

…move line