[FIX] web: avoid rendering fields on one2many list validation

This rev. reverts 91911159

The above rev. was a good idea, except that internal_set_value expects the raw value, while the records attributes can be tuples(for instance, many2one are tuple(id, name) or list of command(one2many, many2many).

set_value must be use here, as all fields (js) override set_value in order to handle their value repr (for instance, many2one fields handle the tuple (id,name).

Besides, avoiding the re-render provides a huge performance improvment, as rerendering fields can lead to xmlrpc calls (for instance, re-rendering a many2one field implies calling the name_get method)

opw-620111
opw-622108