Fix some channels issues

* Reset notification icon to asterisk (Fixes #67)

* Only show subscribed channels

components/channels.go

@@ -15,7 +15,7 @@ const (
 	IconChannel      = "#"
 	IconGroup        = "☰"
 	IconIM           = "●"
-	IconNotification = "🞷"
+	IconNotification = "*"
 
 	PresenceAway   = "away"
 	PresenceActive = "active"

service/slack.go

@@ -83,6 +83,7 @@ func (s *SlackService) GetChannels() []Channel {
 		chans = append(chans, Channel{})
 	}
 	for _, chn := range slackChans {
+		if chn.IsMember {
 			s.SlackChannels = append(s.SlackChannels, chn)
 			chans = append(
 				chans, Channel{
@@ -94,6 +95,7 @@ func (s *SlackService) GetChannels() []Channel {
 				},
 			)
 		}
+	}
 
 	// Groups
 	slackGroups, err := s.Client.GetGroups(true)