call: set displayName for ring accounts

Send the alias of the Ring account as the displayName
This is retro-compatible, by setting the displayName field on any ring
account created before this change.

Issue: #77365
Change-Id: Ifbe6269fa5fd6095cd0f61bfb23e443998418a16
diff --git a/src/AccGeneralVC.mm b/src/AccGeneralVC.mm
index a2d33b1..2d6f45d 100644
--- a/src/AccGeneralVC.mm
+++ b/src/AccGeneralVC.mm
@@ -206,6 +206,7 @@
     switch ([textField tag]) {
         case ALIAS_TAG:
             [self currentAccount]->setAlias([[textField stringValue] UTF8String]);
+            [self currentAccount]->setDisplayName([[textField stringValue] UTF8String]);
             break;
         case HOSTNAME_TAG:
             [self currentAccount]->setHostname([[textField stringValue] UTF8String]);