Manage login and logout in mobile view

front/src/LogIn.vue

@@ -45,6 +45,7 @@
   <div v-if="formError" class="notification is-danger">
     <p>{{formError}}</p>
   </div>
+  <h1 class="title">{{$t('login.title')}}</h1>
   <form class="box" @submit.prevent="onSubmit">
     <div class="field">
       <label class="label">{{$t('login.username')}}</label>