SIP: Default to the account's server when excluding @domain
When entering a SIP address, it should automatically assume to use the account's server when they do not enter the @domain part.
Example, if my account is user@voip.com, and I just enter "13025556666", it should initiate a call with 13025556666@voip.com so I don't have to actually type out the "@voip.com".
Edited by BurnyBoi