reply: use new-message template for non-quoted replies

Unless a template is specified with reply -T, use the new-message
template for non-quoted replies.

Fixes: 877a94f5d9 ("compose: add default template for new messages")
Signed-off-by: Robin Jarry <robin@jarry.cc>

commands/msg/reply.go

@@ -221,6 +221,9 @@ func (reply) Execute(aerc *widgets.Aerc, args []string) error {
 		})
 		return nil
 	} else {
+		if template == "" {
+			template = aerc.Config().Templates.NewMessage
+		}
 		return addTab()
 	}
 }