CLOSED - task 38: Disable the Ir option on dropdown of manyToOne
relationships when id is nul 
https://github.com/lomagno2003/inmobiliarias.frontend/issues/issue/38
CLOSED - task 30: Find the new id value when creating relations from
oneToMany relationships 
https://github.com/lomagno2003/inmobiliarias.frontend/issues/issue/30
OPEN - task 23: Add error check in all promises and show dialog boxes
with descriptions 
https://github.com/lomagno2003/inmobiliarias.frontend/issues/issue/23