NF isNull for object of contact

- repair Structured name creating operation for update or add new val
- synchonization
- password now show text
- when edit server connection and test is not successfull no save this data
- after import in no first run no go to main manu, stay in contact server
- load contact server only once if go to servercontact activity
- back finish to synchonization
- set objects to null if their attributes values are null