[IMP] orm: do not use xpath for hidding buttons when user hasn't the right role
[IMP] orm: do not use xpath for hidding buttons when user hasn't the right role

MarkusTeufelberger/openobject-server,ovnicraft/openerp-server,vnc-biz/openerp-server,xrg/openerp-server,gisce/openobject-server,splbio/openobject-server,vnc-biz/openerp-server,splbio/openobject-server,splbio/openobject-server,xrg/openerp-server,MarkusTeufelberger/openobject-server,gisce/openobject-server,gisce/openobject-server,ovnicraft/openerp-server,MarkusTeufelberger/openobject-server