Ensure we can still send messages to ourselves (sync) and disable group chats

libtextsecure/sendmessage.js

@@ -391,6 +391,7 @@ MessageSender.prototype = {
       );
 
       if (
+        number === textsecure.storage.user.getNumber() ||
         haveSession ||
         options.isPublic ||
         options.messageType === 'friend-request'

preload.js

@@ -470,5 +470,5 @@ window.SMALL_GROUP_SIZE_LIMIT = 10;
 
 window.lokiFeatureFlags = {
   multiDeviceUnpairing: false,
-  privateGroupChats: true,
+  privateGroupChats: false,
 };