erp5_corporate_identity: try to get 'en' logo if user language logo is not presented

See merge request !1216
3 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

01:07:40

failed ERP5.UnitTest-Master

02:33:59

failed ERP5.UnitTest-Master.Medusa

02:21:37