[REV] Revert #4770. Will break something in buttons type objects.
[REV] Revert #4770. Will break something in buttons type objects.

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extra : convert_revision : fme%40openerp.com-20110510114250-rq8krxawnwgl060p

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