Make webclient call name_get()

This proposal fixes a glitch related to the web client in v7 and brings a few cosmetic changes to l10n_fr_naf_ape.
This change displays the short name of the NAF category on the partner form.
To do this, it forces the web client to call name_get() when it displays the NAF field on the partner form instead of relying on a context-insensitive prefetch.
Ported from original merge proposal on launchpad https://code.launchpad.net/~numerigraphe-team/openerp-data/7.0-fix-naf-shortname/+merge/215446