[IMP] improve tree structure in export.
[IMP] improve tree structure in export.
vnc-biz/openerp-web,MarkusTeufelberger/openerp-web,gisce/openerp-web,splbio/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web,gisce/openerp-web,MarkusTeufelberger/openerp-web,vnc-biz/openerp-web,vnc-biz/openerp-web,vnc-biz/openerp-web,gisce/openerp-web,splbio/openerp-web