removed cliping of login page when loading tracim with auth cookie

src/container/PrivateRoute.jsx

 // "You should not use <Route component> and <Route render> in the same route; <Route render> will be ignored
 const PrivateRoute = ({ component: Component, ...rest }) => (
   <Route {...rest} render={props => rest.user.logged
-    ? <Component {...props} />
-    : <Redirect to={{pathname: '/login', state: {from: props.location}}} />
+    ? <Component {...props} /> // user logged, return composant
+    : rest.user.logged === null
+      ? <div /> // dont know if user logged yet (waiting for api to respond), do nothing @TODO display loader
+      : <Redirect to={{pathname: '/login', state: {from: props.location}}} /> // // user not logged, redirect to login page
   } />
 )
 

src/container/Tracim.jsx

       auth: Cookies.get('user_auth')
     }
 
-    if (userFromCookies.email === undefined || userFromCookies.auth === undefined) return
-
     const fetchGetUserIsConnected = await dispatch(getUserIsConnected(userFromCookies))
     switch (fetchGetUserIsConnected.status) {
       case 200:
       case 401:
         dispatch(setUserConnected({logged: false})); break
       default:
-        dispatch(setUserConnected({logged: undefined})); break
+        dispatch(setUserConnected({logged: null})); break
     }
   }
 
   handleRemoveFlashMessage = msg => this.props.dispatch(removeFlashMessage(msg))
 
   render () {
-    const { flashMessage, t } = this.props
+    const { flashMessage, user, t } = this.props
 
     return (
       <div className='tracim'>

src/reducer/user.js

 
 const defaultUser = {
   user_id: -1,
-  logged: false, // undefined avoid to be redirected to /login while whoami ep has not responded yet
+  logged: null, // null avoid to be redirected to /login while whoami ep has not responded yet
   timezone: '',
   profile: {
     id: 1,