[FIX] Livechat sidebar using "Unread on Top" user preference (#10734)

[FIX] User's preference `Unread on Top` wasn't working for LiveChat rooms

packages/rocketchat-livechat/client/views/sideNav/livechat.js

@@ -22,10 +22,10 @@ Template.livechat.helpers({
 		};
 
 		const user = RocketChat.models.Users.findOne(Meteor.userId(), {
-			fields: { 'settings.preferences.roomsListExhibitionMode': 1 }
+			fields: { 'settings.preferences.sidebarShowUnread': 1 }
 		});
 
-		if (RocketChat.getUserPreference(user, 'roomsListExhibitionMode') === 'unread') {
+		if (RocketChat.getUserPreference(user, 'sidebarShowUnread')) {
 			query.alert = { $ne: true };
 		}
 

server/startup/migrations/v120.js

@@ -0,0 +1,41 @@
+RocketChat.Migrations.add({
+	version: 120,
+	up() {
+		RocketChat.models.Users.update({
+			'settings.preferences.roomsListExhibitionMode': 'activity'
+		}, {
+			$unset: {
+				'settings.preferences.roomsListExhibitionMode': 1
+			},
+			$set: {
+				'settings.preferences.sidebarSortby': 'activity',
+				'settings.preferences.sidebarShowFavorites': true
+			}
+		});
+
+		RocketChat.models.Users.update({
+			'settings.preferences.roomsListExhibitionMode': 'unread'
+		}, {
+			$unset: {
+				'settings.preferences.roomsListExhibitionMode': 1
+			},
+			$set: {
+				'settings.preferences.sidebarSortby': 'alphabetical',
+				'settings.preferences.sidebarShowUnread' : true,
+				'settings.preferences.sidebarShowFavorites': true
+			}
+		});
+
+		RocketChat.models.Users.update({
+			'settings.preferences.roomsListExhibitionMode': 'category'
+		}, {
+			$unset: {
+				'settings.preferences.roomsListExhibitionMode': 1
+			},
+			$set: {
+				'settings.preferences.sidebarSortby': 'alphabetical',
+				'settings.preferences.sidebarShowFavorites': true
+			}
+		});
+	}
+});