There is no validation for identifier in "new identifier" command

Steps to Reproduce:

1. Open the CLI.
2. Type command "new ideinfier abcde" (or "new ideinfier 000000").
   => no errors, identifier successfully created.
3. Try to send NYM with this identifier as Trustee:
   send NYM dest=abcde (or send NYM dest=000000)

Actual Results:
Identifier created without any errors, but sending NYM with this identifier is impossible:

Error: client request invalid: InvalidClientRequest('validation error [ClientNYMOperation]: b58 decoded value length 4 should be one of [16, 32] (dest=abcde)',)

Error: client request invalid: InvalidClientRequest("validation error [ClientNYMOperation]: should not contain the following chars ['0'] (dest=000000)",)

Expected Results:
Identifier in "send identifier" command should be validated same as in "send NYM" command.