For direct chats, set history visibility to "invited"

Also use "initial_state" to set admin(s).

src/services/matrix.service.js

@@ -872,7 +872,17 @@ export default {
                   type: "m.room.history_visibility",
                   state_key: "",
                   content: {
-                    history_visibility: "joined",
+                    history_visibility: "invited",
+                  },
+                },
+                {
+                  type: "m.room.power_levels",
+                  state_key: "",
+                  content: {
+                    users: {
+                      [this.currentUserId]: 100,
+                      [userId]: 100,
+                    },
                   },
                 },
               ],
@@ -881,7 +891,6 @@ export default {
             return this.matrixClient
               .createRoom(createRoomOptions)
               .then(({ room_id, room_alias }) => {
-                this.makeAdmin(room_id, userId); // Make the other user an equal
                 resolve(this.getRoom(room_alias || room_id));
               })
               .catch((error) => {