[ICU-621] Add ExperimentalGroupUnreadChannels setting (#8127)

* Add ExperimentalGroupUnreadChannels setting * track ExperimentalGroupUnreadChannels in diagnostics
2018-01-23 17:59:41 -03:00
--- a/config/default.json
+++ b/config/default.json
@@ -57,6 +57,7 @@
        "CloseUnusedDirectMessages": false,
        "EnableTutorial": true,
        "ExperimentalEnableDefaultChannelLeaveJoinMessages": true,
+        "ExperimentalGroupUnreadChannels": false,
        "ImageProxyType": "",
        "ImageProxyURL": ""
    },