Prevent archived rooms from showing up in the list of all channels

packages/rocketchat-lib/server/models/Rooms.coffee

@@ -147,6 +147,17 @@ RocketChat.models.Rooms = new class extends RocketChat.models._Base
 
 		return @find query, options
 
+	findByTypeAndArchivationState: (type, archivationstate, options) ->
+		query =
+			t: type
+
+		if archivationstate
+			query.archived = true
+		else
+			query.archived = { $ne: true }
+
+		return @find query, options
+
 	findByVisitorToken: (visitorToken, options) ->
 		query =
 			"v.token": visitorToken

server/methods/channelsList.coffee

@@ -1,3 +1,3 @@
 Meteor.methods
 	channelsList: ->
-		return { channels: RocketChat.models.Rooms.findByType('c', { sort: { msgs:-1 } }).fetch() }
+		return { channels: RocketChat.models.Rooms.findByTypeAndArchivationState('c', false, { sort: { msgs:-1 } }).fetch() }