Include members set and team in SlackThreadChannel
Allows autocompletion of nicks to work (instead of error from  `nick_completion_cb`)
@@ -1756,6 +1756,8 @@ class SlackThreadChannel(object):
self.type = "thread"
self.got_history = False
self.label = None
+ self.members = self.parent_message.channel.members
+ self.team = self.parent_message.channel.team
# self.set_name(self.slack_name)
# def set_name(self, slack_name):
# self.name = "#" + slack_name
