To get the listbox cell value : code was getting last proxy target
instead of browsing the full proxy target stack.

/bug #20190111-1F86B7B
https://nexedijs.erp5.net/#/bug_module/20190111-1F86B7B

/reviewed-on nexedi/erp5!856

We randomly have unkilled firefox process remaining. Make sure
to kill them.

/bug #20190204-1BF3A5A
https://nexedijs.erp5.net/#/bug_module/20190204-1BF3A5A

/reviewed-on nexedi/erp5!848

- local_roles: ( Assignee OR Assignor ) AND other_unknown_id: value

    [All criterions (AND)_______ v]
    [-][local_roles_____________ v] -> |Type             |  -.
       [Equal to (at least one)_ v]    |Modification Date|   :
       [Assignee________________  ]    |Title            |   :
       [Assignor________________  ]    |Reference        |   :
       [________________________  ]    |Description      |   : search_column_list
                                       |State            |   :
    [-][other_unknown_id________ v]    |Searchable Text  |   :
       [Equal to________________ v]    |Search Expression|  -'
       [value___________________  ]    |local_roles      |  -.
                                       |other_unknown_id |  -' additional_search_column_list

- the "Equal to (at least one)" operator is displayed in the same listbox as "Equal to" and "Contains" ;
- this filter item can have multiple input value field ;
- one input value field has to be filled (required) like on the other filter items ;
- when extended_search is `title: ( "One" OR "Two" )`, behavior changed :

    ________before________  ______________now______________

         Filter Editor               Filter Editor
    [ At least one (OR) v]  [ All criterions (AND)______ v]
    [-][ Title_________ v]  [-][ Title__________________ v]
       [ Equal to______ v]     [ Equal to (at least one) v]
       [ One___________ x]     [ One____________________ x]
    [-][ Title_________ v]     [ Two____________________ x]
       [ Equal to______ v]     [ _______________________  ]
       [ Two___________ x]  [+]
    [+]

         Search bar                  Search bar
    [One][Two][ _______  ]  [One][Two][ ________________  ]

Activate copy/paste/delete buttons on form list and form view.

When selection listbox lines, only use what is visible / checked.
This is required because of list methods which do not support catalog queries.

This changes the behaviour of mass workflow transition action and delete action,
but at least, it is consistent everywhere now, and so, easier to explain (what you see is what you change).

The listboxes in mass delete / state change dialogs are only used to confirm the lines selection.

/reviewed-on nexedi/erp5!852

/reviewed-on nexedi/erp5!850

Introduce a new ERP5Site_resetAccountingTransactionLineGroupingReference
script to reset grouping reference on accounting transaction lines.

This solve a problem with the way we activated on
AccountingTransactionLine_resetGroupingReference the context of the
line, if line was removed from OFS before activity was executed, the
activity was discarded and grouping references on related lines was not
reset.

Also drop the unused `keep_if_valid_group` parameter, it was not making
sense.

/reviewed-on !849

Also, make some existing sanitation happen earlier than before, to store
values in a cleaner format.