[MERGE] diagram view: properly handle non-ASCII arrow labels
[MERGE] diagram view: properly handle non-ASCII arrow labels
gisce/openobject-server,splbio/openobject-server,splbio/openobject-server,vnc-biz/openerp-server,vnc-biz/openerp-server,splbio/openobject-server,MarkusTeufelberger/openobject-server,gisce/openobject-server,gisce/openobject-server,MarkusTeufelberger/openobject-server,MarkusTeufelberger/openobject-server,ovnicraft/openerp-server,ovnicraft/openerp-server