[FIX] website: prevent t-field on selection fields

This quick fix avoids a buggy behaviour in version 8.0 that could
confuse users.

A future version should implement properly selection fields in t-field.

(closes #2490)

(cherry picked from commit fe3cac30e4c5c132da1de02576d4aa325979ccd9)
[IMP] website_sale : avoid duplicated order lines

Add line id to while calling _cart_update() from sale_get_order()
The missing line_id parametre was making the _cart_find_product_line() call to fail as it was linked to an option while searching for lines without options (making the method recreate new lines).
Fixes #2573
[FIX] portal_sale: force empty context

The context was removed by 1933e926.
[FIX] crm: merge the phonecalls during an opportunities merge
[FIX] paymnet_ogon: add missing SHA OUT keys

The SHA OUT list was incomplete and therefore SHASIGN was not matching anymore
List of keys from https://viveum.v-psp.com/Ncol/Viveum_e-Com-BAS_EN.pdf
[FIX] payment_ogone: last commit
[MERGE] forward port of branch 7.0 up to 5f6d324
[FIX] account_voucher: do not unlink records in onchange method

The method recompute_voucher_lines() is used by several onchange methods of
account.voucher.  It used to unlink() the voucher lines before recomputing new
voucher lines.  As a side effect, if you edit a voucher and discard your
changes, your voucher has lost its lines, although you did not save your
changes!  Moreover, the call to unlink() is invalidating the record cache,
which screws up completely the onchange() method.

So, instead of unlinking the existing lines, the onchange generates commands
[(2, id), ...] to remove the existing lines only when saving the changes.
[FIX] account_voucher: use resolve_2many_commands() instead of buggy-hand-written function
[FIX] website_sale: free carts were not confirmed
[FIX] Error when installing module document
[FIX] payment: transaction formview display issue

Using group without defining the col attribute will let the form
renderer choose the right display to avoid screwing up the layout
[FIX] res_users: do not copy login_date when duplicating users
Modify General Ledger report to be printed on landscape if set in wizard.
[FIX] cron: doall false by default

As in most cases, we do not want this doall
[FIX] fix context problem in graph view

The group_by query expects the context to have group_by_no_leaf = true,
so we can not just blindly forward the context to the groupby query.
This is a defensive way to fix the problem, to avoid other possible
crashes.  But the context shouldn't have group_by_no_leaf anyway,
it does not make sense to explicitely do that in the action
[FIX] im_chat, im_livechat : fix the loading history for anonymous user and remove useless search_user_status rpc call.
[ADD] im_odoo_support : add the module for the live odoo support from all instances. This sets the bus and im_chat module auto installable.
[MERGE] forward port of branch 7.0 up to af37b30
[MERGE] forward port of branch saas-3 up to fe8106f