Fix for auth token not being refreshed every 55 minutes

The problem was that if you set token manually (`gApi.auth.setToken(obj)`), then any consequent calls to refresh the token with `gApi.auth.authorize()` would not return the new token because it thinks that the token that you already have is still valid. And the reason it thinks token is still valid is because this code `_accessToken = obj = pick(obj, "access_token", "state");` strips out token expiry information, so when we call `gApi.auth.setToken(obj);` then gApi sets expiry to 24 hours from that moment instead of 1 hours after last `gApi.auth.authorize()` call.
There were 2 possible solutions:
1) Do not strip out expiry information from the token. Better yet keep it as is without any modifications.
2) Do not set token manually with `gApi.auth.setToken()`.
I decided that second option works better because it makes code simpler and because we always call `gApi.auth.authorize()` on application load anyway.