[FIX] Make field registry tolerant to widget type
[FIX] Make field registry tolerant to widget type

MarkusTeufelberger/openerp-web,splbio/openerp-web,MarkusTeufelberger/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web,gisce/openerp-web,gisce/openerp-web,gisce/openerp-web,splbio/openerp-web